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CHI - SEA

$75 Find cheap flights from Chicago to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Chicago to Seattle departing on 8/27. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Thu 6/27
Thu 7/4

Search hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to Seattle.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to Seattle.
In the last 7 days travelers have searched 42,816,550 times on KAYAK, and here is why:

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Cheap flight deals from Chicago to Seattle (CHI-SEA)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Chicago to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
4:04 pm - 6:42 pmORD-SEA
4h 38mnonstop
12:30 am - 6:28 amSEA-ORD
3h 58mnonstop
$149United Airlines
Find Deal
Tue, Aug 13 - Fri, Aug 16
6:30 pm - 9:09 pmORD-SEA
4h 39mnonstop
12:55 pm - 12:40 amSEA-ORD
9h 45m1 stop
$154United Airlines
Find Deal
Tue, Aug 13 - Tue, Aug 20
6:00 am - 8:34 amORD-SEA
4h 34mnonstop
7:00 am - 4:15 pmSEA-ORD
7h 15m1 stop
$178Alaska Airlines
Find Deal
Wed, Aug 21 - Wed, Aug 28
7:00 am - 9:25 amORD-SEA
4h 25mnonstop
6:00 pm - 11:56 pmSEA-ORD
3h 56mnonstop
$179Delta
Find Deal
Wed, Aug 21 - Mon, Aug 26
11:32 am - 8:57 pmMDW-SEA
11h 25m1 stop
9:47 pm - 10:42 amSEA-MDW
10h 55m1 stop
$179Frontier
Find Deal
Tue, Aug 13 - Tue, Aug 20
10:26 pm - 9:10 amMDW-SEA
12h 44m1 stop
9:52 pm - 10:31 amSEA-MDW
10h 39m1 stop
$180Frontier
Find Deal
Sat, Jun 8 - Tue, Jun 11
2:25 pm - 6:50 pmORD-SEA
6h 25m1 stop
10:45 pm - 4:40 amSEA-ORD
3h 55mnonstop
$188Alaska Airlines
Find Deal
Thu, Jul 11 - Wed, Jul 17
7:08 pm - 9:57 pmORD-SEA
4h 49mnonstop
5:10 am - 11:10 amSEA-ORD
4h 00mnonstop
$224American Airlines
Find Deal
Wed, Jun 19 - Tue, Jul 2
6:50 pm - 9:34 pmORD-SEA
4h 44mnonstop
6:00 pm - 11:58 pmSEA-ORD
3h 58mnonstop
$243Delta
Find Deal
Wed, Jun 12 - Sat, Jun 15
5:05 am - 10:27 amORD-SEA
7h 22m1 stop
10:52 pm - 5:07 amSEA-ORD
4h 15mnonstop
$304American Airlines
Find Deal
Sun, Jun 9 - Thu, Jun 13

Flights from Chicago to Seattle - Travel Insights & Trends

Get data-powered insights and trends into flights from Chicago to Seattle to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Chicago to Seattle flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for one-way flights from Chicago to Seattle.
Our data shows that the cheapest route for a one-way flight from Chicago to Seattle cost $92 and was between Chicago O'Hare Intl Airport and Seattle. On average, the best prices are found if you fly this route. The average price for a return flight for this route is $148.

What’s the cheapest day of the week to fly from Chicago to Seattle?

The average price of all flights from Chicago to Seattle clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from Chicago to Seattle, look for departures on Tuesdays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Seattle, Tuesday is the cheapest day to fly and Sunday is the most expensive.

What is the cheapest month to fly from Chicago to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Chicago to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Chicago to Seattle is January, where tickets cost $178 on average. On the other hand, the most expensive months are July and June, where the average cost of tickets is $398 and $376 respectively.

How far in advance should I book a flight from Chicago to Seattle?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Chicago to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Chicago to Seattle, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 29 days before departure.

Which airlines provide the cheapest flights from Chicago to Seattle?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the past 3 days, the cheapest one-way tickets to Seattle from Chicago were found on Alaska Airlines ($75) and Spirit Airlines ($78), and the lowest round-trip tickets were found on United Airlines ($149) and Alaska Airlines ($178).

Which airlines fly most frequently between Chicago and Seattle?

Alaska Airlines (12 flights per day), United Airlines (7 flights per day), and Delta (5 flights per day) are the most frequent flyers of this route.

Which airlines fly non-stop between Chicago and Seattle?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from Chicago to Seattle.
There are 5 airlines that fly nonstop from Chicago to Seattle. They are: Alaska Airlines, American Airlines, Delta, Southwest and United Airlines. The cheapest price of all airlines flying this route was found with Alaska Airlines at $84 for a one-way flight. On average, the best prices for this route can be found at American Airlines.

How many flights are there between Chicago and Seattle per day?

Each day, there are between 29 and 36 nonstop flights that take off from Chicago and land in Seattle, with an average flight time of 4h 35m. The most common departure time is 8:00 am and most flights take off in the afternoon. Each week, there are 224 flights. The most frequent day of departure is Thursday, when 16% of all weekly flights depart. The fewest flights depart on a Sunday.

Which cabin class options are there for flights between Chicago and Seattle?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There are 4 cabin class options for the route. These are First, Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How long does a flight from Chicago to Seattle take?

A direct flight to Seattle will take on average 4h 25m to travel the 1,731 miles flying distance from Chicago.

What’s the earliest departure time from Chicago to Seattle?

Early birds can take the earliest flight from Chicago at 6:00 am and will be landing in Seattle at 8:31 am.

What’s the latest departure time from Chicago to Seattle?

If you prefer to fly at night, the latest flight from Chicago to Seattle jets off at 10:55 pm and lands at 1:25 am.

Good to know

Low season

February

High season

June

Cheapest flight

$75
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly with an average 38% increase in price.
Flight from Chicago O'Hare Airport to Seattle

When to book flights from Chicago to Seattle

Are your dates flexible? Find out the best times to travel from Chicago to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Chicago to Seattle

  • Does ORD have any lounges?

    Yes, ORD is home to several lounges where you can relax before or after your flights. United Club has lounges in Concourses B, C, and F, where passengers can pay at the door provided they have proof of the airline’s ticket. Swissport Lounge is between Gates M8 and M7 airside of Terminal 5, while American Airlines has lounges in Concourses G, H, and L.

  • Does Chicago O’Hare International Airport offer support for travelers with special needs?

    Yes, ORD offers support for passengers with special needs. The airport runs an accessibility service program for passengers with reduced mobility or other disabilities. The program offers electric carts, wheelchairs, and assistance when boarding your flight. Contact your airline if you need these services. Additionally, the airport has several accessible features including public telephones, parking, and restrooms.

  • Are there pet amenities at Chicago O’Hare International Airport?

    Yes, ORD is a pet-friendly facility. The airport has areas where you can take your pets to relieve themselves before your flight to Seattle. The areas are outside the terminal buildings and are equipped with waste disposal bags and artificial turf. The airport also offers pet cargo services for the big pets that can’t travel inside the cabin.

  • What is the easiest way to get to the city center from Seattle-Tacoma International Airport?

    The Link Light Rail offers one of the easiest ways to get to the city center from SEA. Not only is it fast, but it is also an affordable way to complete this trip. You can get your ticket from the airport's Link Light Rail Station on the parking garage's fourth floor. The total trip from the airport to the West Lake Station takes about 30min.

  • What are the common stopover options for Chicago to Seattle flights?

    Most of the airlines flying this route offer direct flights. However, flights with stops en route are also available. The stopover options between Chicago and Seattle vary depending on your airline and origin airport. When flying from ORD on a one-stop flight with Spirit Airlines, expect a layover at Harry Reid International (LAS) in Las Vegas.

  • Which of the airports in Chicago is the best to fly out of for flights to Seattle?

    Flying from Chicago ORD will give you more flight options as it is the larger and busier of the two Chicago airports. The airport is a major hub for several airlines including United Airlines and American Airlines. Additionally, it has more amenities including lounges, restaurants, and shops.

  • Is O’Hare airport child-friendly?

    The O'Hare airport is child-friendly since it has children's play areas. There are also kids' meals included in the restaurants. For as low as $3, your child will enjoy a healthy meal at any of the restaurants.

  • Are there hotels nearby Midway airport?

    Some of the nearby hotels include: Sleep Inn Hotel which charges approximately $110 per night and is located approximately 1.2 miles from the airport, LaSalle Lodge which charges approximately $35 per night and is located approximately 8.7 miles from the airport, and Courtyard Hotel which charges approximately $120 and is located approximately 1.2 miles from the airport.

  • Are Seattle airport employees friendly?

    Yes, all the staff working at Seattle airport are not only friendly but also professionally trained. You can approach any staff at the airport in case you experience any difficulties while moving around the airport.

  • Are there duty-free stores at Seattle airport?

    Duty-free stores are available at this airport. You will find them in the international departure area. If you forgot to buy a gift or a certain item, the store sells cosmetics, fragrances, and food at friendly prices.

  • What is the cheapest flight from Chicago to Seattle?

    In the last 3 days, the lowest price for a flight from Chicago to Seattle was $75 for a one-way ticket and $149 for a round-trip.

  • Do I need a passport to fly between Chicago and Seattle?

    No, a passport isn't needed to fly from Chicago to Seattle. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Chicago to Seattle?

    There are 2 airports in Chicago (Chicago Midway and Chicago O'Hare Intl.) and only 1 airport in Seattle (Seattle/Tacoma Intl). The cheapest flights are generally found on the Chicago O'Hare Airport to Seattle/Tacoma Intl flight route.

  • Which airlines offer Wi-Fi service onboard planes from Chicago to Seattle?

    American Airlines, Alaska Airlines, Delta, and Air Canada offer inflight Wi-Fi service on the Chicago to Seattle flight route.

  • Which aircraft models fly most regularly from Chicago to Seattle?

    The Boeing 737-800 is the aircraft model that flies most regularly on the Chicago to Seattle flight route.

  • Which airline alliances offer flights from Chicago to Seattle?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Chicago and Seattle, with oneworld being the most commonly used for this route.

  • On which days can I fly direct from Chicago to Seattle?

    There are nonstop flights from Chicago to Seattle on a daily basis.

  • Which is the best airline for flights from Chicago to Seattle, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from Chicago to Seattle are Alaska Airlines and Delta. With an average price for the route of $299 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $267 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from Chicago to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Chicago to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Chicago to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Chicago is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Chicago to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Chicago with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Chicago to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Chicago up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from Chicago to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for $159 or less one-way and $267 or less round-trip.
  • Chicago O’Hare International Airport (ORD) consists of Terminals 1, 2, 3, and 5 and Concourses B, C, E, F, G, H, K, L, M. While it is a large airport, getting around it is easy thanks to an automated train that ferries passengers across the four terminals.
  • Seattle-Tacoma International Airport (SEA) schedules live music performances throughout the airport as part of its Experience the City of Music program. The performances run daily from 9 a.m. to 3 p.m.
  • Consider flying from Chicago-Midway International Airport (MDW) if you’re looking to avoid the crowds typical of major airports. MDW being smaller than ORD means it is usually less crowded and therefore easier to navigate.
  • You will be using either the Midway airport or O’Hare airport when flying to Seattle from Chicago. The Midway airport is located approximately 8 miles away from the loop. The O’Hare airport is situated approximately 14 miles from the Loop business district. It is one of the busiest airports in Chicago.
  • The O'Hare airport has different parking spaces to suit your preferences. Some of the parking spaces include hourly parking spaces where you pay $3 per hour, daily parking lots where you pay $42 per day, international parking lots where you pay $3 per hour, Economy G and F where you pay $15 and $22 per day respectively. You can reserve a parking lot early enough to avoid any inconvenience.
  • Midway airport collaborates with reputable transport companies to offer transfer services to and from the airport. You can access the city from the airport via train, taxi or by bus. If you want to experience a VIP travel experience, you can hire a limo from a reputable company.
  • The Seattle international airport is renowned due to its wide array of amenities that enhance your traveling experience. There is a lost and found department where you can report any items you may have lost within the airport premises. You will be contacted once your property is found. This department mainly deals with items that may have gotten lost within the premises but if you lost your property while on a flight, contact your airline and report the same.
  • Security is usually beefed up at the Midway airport. All passengers arriving or departing from the airport undergo a vigorous security check before they are cleared. There is a security department where any cases of lawlessness at the airport can be reported. As a passenger, you are assured of top security when departing or arriving at the airport.
  • O'Hare airport has plenty of shops and restaurants where you will get to enjoy a plethora of cuisines. There are both sit-in and takeaway restaurants. You can enjoy duty-free shopping at any of the shopping outlets. The products are not only affordable but also high-quality.
See more tips

Prefer to fly non-stop from Chicago to Seattle?

Find which airlines fly direct from Chicago to Seattle/Tacoma Intl, which days they fly and book direct flights.

Nonstop departures

Chicago to Seattle/Tacoma Intl

Monday

Aer Lingus, Air France, Air Tahiti Nui, +19 more

Aer Lingus, Air France, +20 more

Tuesday

Aer Lingus, Air France, Air Tahiti Nui, +19 more

Aer Lingus, Air France, +20 more

Wednesday

Aer Lingus, Air France, Air Tahiti Nui, +21 more

Aer Lingus, Air France, +22 more

Thursday

Aer Lingus, Air France, Air Tahiti Nui, +19 more

Aer Lingus, Air France, +20 more

Friday

Aer Lingus, Air Tahiti Nui, Alaska Airlines, +20 more

Aer Lingus, Air Tahiti Nui, +21 more

Saturday

Aer Lingus, Air France, Air Tahiti Nui, +19 more

Aer Lingus, Air France, +20 more

Sunday

Aer Lingus, Air France, Air Tahiti Nui, +20 more

Aer Lingus, Air France, +21 more

See more direct flights

Nonstop returns

Seattle/Tacoma Intl to Chicago

Monday

Aer Lingus, Air France, Air Tahiti Nui, +18 more

Aer Lingus, Air France, +19 more

Tuesday

Aer Lingus, Air France, Air Tahiti Nui, +20 more

Aer Lingus, Air France, +21 more

Wednesday

Aer Lingus, Air France, Air Tahiti Nui, +20 more

Aer Lingus, Air France, +21 more

Thursday

Aer Lingus, Air France, Air Tahiti Nui, +20 more

Aer Lingus, Air France, +21 more

Friday

Aer Lingus, Air Tahiti Nui, Alaska Airlines, +19 more

Aer Lingus, Air Tahiti Nui, +20 more

Saturday

Aer Lingus, Air Tahiti Nui, Alaska Airlines, +19 more

Aer Lingus, Air Tahiti Nui, +20 more

Sunday

Aer Lingus, Air France, Air Tahiti Nui, +21 more

Aer Lingus, Air France, +22 more

See more direct flights
See more direct flights

Top 5 airlines serving from Chicago to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Chicago to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Chicago to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 9192 reviews
8.6Crew
8.2Boarding
7.9Comfort
7.3Food
7.3Entertainment
Airline reviews

Flights were on time. Check in was fine. Crew members were pleasant.

10.0 ExcellentAnonymous, May 2024TUS - SEA
Read more about Alaska Airlines reviews

Flights were on time. Check in was fine. Crew members were pleasant.

I would have liked it to have been easier to order food for the flight. My son was not happy with the snack pack I bought him and it was a very long flight for a little boy to go without food.

Ground staff at LAX was very helpful. The Alaska lounge food and service is better than most airport lounges. I think the Staff are well trained polite and actually seem happy to work there. Great service Thanks 🙏 Jjk

The flight was very very delayed and arrived much later than planned. There was no communication about why or when our arrival would be. I would expect better and open communication about the flight but there was none. Also just pretzels? How disappointing.

I got to my destination but no comforts no snacks nothing. Like herding cows!!

My only comment was the confusion at Houston. Suppose to leave at 6 am and didn't leave til 11 am. Then moving from gate 10 to 30 and couple of hours later back to gate 10. Otherwise everyone everything was great.

The food options could be better. Possibly some sandwiches to be added to the menu.

There was a medical emergency on board the crew handled it very professionally and the ambulance crew as well. I am very impressed. Thank you Clyde Barron 31 D

Checking in was very easy. Boarding and the flights went smoothly.

I have never flown Alaska Airlines before & would recommend them to anyone& will use again

Delta crushed it. Flight attendant in first was attentive and just never stopped. Honestly one of the best domestic flights I’ve been on.

Delta is one of the best airlines I have flown

It was a Red-Eye flight so was not comfortable enough to sleep, but seat was as expected. Crew was great and in-flight entertainment was excellent. Flight was smooth

Standard economy seats on Deltas 767 were better than Alaska premium seats on their 737 MAX9; more legroom, wider seats. Entertainment was great, no ipad or phone required. Could have included a meal service.

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

The boarding process was terrible especially with an indirect flight Chicago to Seattle to San Diego was terrible talking about we overbooked a flight idk if I’d take this airline ever again we got off our flight from Chicago to Seattle and we traveled for business and they told us our connecting flight was over booked and their was no seats asking people to take a delayed next flight and they don’t tell anyone coughing to wear masks seats 30A-B were terrible during the flight no one wants to sit next to people coughing all around I don’t want to be sick traveling for work or get sick anytime it’s very upsetting the staff doesn’t take this stuff serious to tell them to wear masks when they see people coughing and sneezing

Flight was on time, the crew was personable & professional, & the plane arrived early which was nice.

This flight landed early, but deplaned late. We were stuck sitting and waiting for a gate for over an hour

My flight was very clean and the location was comfortable. The service was great. A satisfying flight!

I appreciated being upgraded. I was very disappointed with my 13 hr layover in Seattle to geg, while my friends who flew Alaska made it home as scheduled. I had to reserve a hotel on my dime.

There was no screens on board AND the WiFi didn’t work. My seat was broken and couldn’t recline so I couldn’t even sleep. The flight attendants didn’t offer anything to make it more comfortable. It was such an old cramped plane, when the person in front of me reclined I couldn’t even open my tray table. All the United ads talk about guaranteeing everyone gets a screen!

An hour and a half late is UNACCEPTABLE. The negative impact to our family is unconscionable. And for the price we were forced to pay...

I’ve had a couple flights this week on United that were delayed by an hour or more

Great! The plane was decently sized and comfortable. The staff was nice and there was great in flight entertainment

Last minute gate change nearly caused us to miss our flight. Change was not announced or displayed in the main board at the old gate. Terrible communication. When we landed we had to wait 20 minutes because there was another plane at the assigned gate. Not the crew’s fault, but adding 20 minutes to a 45 minute flight sucked.

delay several times and wait extra long to board. no entertainment service because there are problem for some rows. always encounter some delays for the last flight of the day.

The flight experience was very good! Especially the United Club!

I was not able to buy food in the flight. They refer to include your Credit card in the APP, and if you are not from USA (i have a credit card form Canada) it is not possible

The flight from Ottawa to Chicago took a lot longer due to DC in Ottawa. We got to Chicago and went to our gate to catch our flight. We only had nine minutes I found that very stressful.

Good boarding. Crew started quick with drinks and food. They came around several times for trash which I really liked. Other than turbulence due to storms in the area, flight was great.

i suspect i caught flu on this flight as i could hear someone coughing a few rows back and ended up with flu a few days later. also tiresome to have to watch movies on my device by holding up smartphone screen, would have liked to have in seat display.

Good flights. Departure and arrivals were on time. DFW was a little problematic in that the Skytrain without prior notice bypassed the Echo terminal so that delayed my arrival at my connecting flight.

Because I can’t stand very long in one place, I was allowed to reword.

I had trouble finding a boarding pass because I had an hour between Flights and American did not see my flight I believe because I was ticketed through KAYAK. I did not have enough time to go to the desk before boarding so I went to the desk and told them while I was boarding and they had a boarding pass for me within three minutes. Nice. I paid extra to have more legroom and it is definitely worth it for a six hour flight. I would’ve paid for a decent dinner, but they didn’t offer anything but a snack box —not good for six hours.

5 hour flight - full flight - not enough room to use my computer - slightly delayed - Admirals club was excellent quality food, drink made up for flight seating. No food offerred on flight, you ahd to prebook.

Excellent- plan was barely populated. I cannot remember a flight where I was able/encouraged to stretch out!

Great flight. Boarding was efficient and quick. On time departure and smooth flight. Flight arrived early at destination. Good experience.

Had technical issue which delayed the flight period. Flight crew knew there was 5 passengers that the connecting flight was within 15 minutes once at the gate. Rather than identify the 5 passengers to assure they got first. The flight attended mentioned it but didn't assist to assure passengers with connecting flights off first. This caused a hardship and our party of 3 missed the connecting flight.

I don't like that I have to pay if I want extra leg room. The seats are so expensive; I sit in normal seats and my legs and knees cramp the entire flight. I never feel comfortable on AA flights.

Terrible flight seats where really uncomfortable I had body aches for 2 days and flight was delays almost two hours

It was ridiculously hard to check in for the flight, and Frontier charged us a LOT of money to have a carry on suitcase, and then told everyone we could not carry on bags and had to check them through at the gate, and didn't refund the extra money we paid to have the suitcase as carry on.

I had a terrible experience with Frontier. I arrived before the 60 minute cut off and was told that Frontier has a two hour window for bags. I was then told the next available flight wasn’t until the end of the day (I had booked a 6am flight). I took a look around and saw other people being told that they could not board their flights or that they had to pay additional fees. I opted to rebook on American Airlines. There’s absolutely no straightforward way to contact Frontier, so this ticket was a complete waste of money. Oh - and the kicker is that the lady lied about the two hour cut off.

Frontier won’t help you at the airport without paying $25. Carry on was $75. Then you get on the plain and every beverage or snack is also a charge. Seats are hard and real packed in. I would never fly them again.

Worst experience I have seen. The flight was cancelled without any reason.

My experience with frontier staff at the Denver airport was absolutely horrible. The manager on duty was even worst if was the worst experience I have ever had, I have never been treated so poorly as a customer in my life! The staff was extremely rude, eye rolls and attitude and then refusal to help me at all. I wish I could never fly frontier again that’s how horrible it was!

The Frontier app wasn’t working. So I could not pay for a carry on the week prior to flying. They charged me 99$ at the gate to carry on a duffle bag.

Good for the price. My only complaint is that the pilot should keep the air flowing while passengers are waiting to getting out of airplane.

Plane could have been more on time. More leg room .

I arrived 1 hour prior to boarding, and they said I was too late for a domestic flight. First time I heard that :-(

Check in online was easy. Seats aren’t very comfortable

Book cheap flights from Chicago to Seattle

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Chicago to Seattle found on KAYAK in the last 72 hours.
8/27Tue
nonstopAlaska Airlines
4h 34mORD-SEA
$75
8/27Tue
1 stopSpirit Airlines
19h 11mORD-SEA
$78
6/15Sat
1 stopFrontier
12h 44mMDW-SEA
$96
6/8Sat
1 stopFrontier
12h 59mORD-SEA
$96
7/1Mon
1 stopSun Country Air
16h 26mORD-SEA
$101
6/21Fri
1 stopSun Country Air
14h 51mORD-SEA
$103
6/13Thu
nonstopDelta
4h 44mORD-SEA
$105
9/2Mon
nonstopUnited Airlines
4h 33mORD-SEA
$132
7/1Mon
nonstopDelta
4h 43mORD-SEA
$139
6/11Tue
nonstopUnited Airlines
4h 38mORD-SEA
$150

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Last minute flights from Chicago to Seattle

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Chicago to Seattle that are departing in the next 10 days.
5/30Thu
multi-stopFrontier
25h 09mMDW-SEA
6/12Wed
multi-stopFrontier
11h 27mSEA-MDW
$208
5/30Thu
multi-stopFrontier
25h 09mMDW-SEA
6/4Tue
multi-stopFrontier
13h 46mSEA-MDW
$209
5/30Thu
multi-stopFrontier
25h 09mMDW-SEA
6/8Sat
multi-stopFrontier
11h 45mSEA-MDW
$210
6/1Sat
nonstopDelta
4h 31mORD-SEA
6/10Mon
nonstopDelta
3h 58mSEA-ORD
$394
6/1Sat
multi-stopAmerican Airlines
9h 21mORD-SEA
6/14Fri
nonstopAmerican Airlines
4h 15mSEA-ORD
$402
6/1Sat
multi-stopAlaska Airlines
6h 27mORD-SEA
6/10Mon
nonstopAlaska Airlines
4h 06mSEA-ORD
$403
5/29Wed
nonstopAlaska Airlines
4h 31mORD-SEA
6/10Mon
nonstopAlaska Airlines
4h 06mSEA-ORD
$414
5/30Thu
nonstopDelta
4h 30mORD-SEA
6/18Tue
nonstopDelta
3h 58mSEA-ORD
$438
5/30Thu
nonstopUnited Airlines
4h 37mORD-SEA
6/19Wed
nonstopUnited Airlines
4h 00mSEA-ORD
$454
6/1Sat
nonstopAmerican Airlines
4h 38mORD-SEA
6/10Mon
multi-stopAmerican Airlines
7h 48mSEA-ORD
$468

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Flights to Seattle

Destination:

Seattle (SEA)United States

Return flight deals:

Seattle - Chicago

Cabin classes:

$497
$496
$482
$168

Compare transportation modes for Chicago to Seattle

Average priceAverage duration
Flights$6504h 25m
Trains$34446h 24m