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ONT

Find cheap Frontier flights to Ontario from $28

1 adult
0 bags
Thu 7/4
Thu 7/11

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Good to know

Low season

January

High season

May

Cheapest flight

$28

Average price round-trip

$64

Good deal round-trip

$45

Good deal one-way

$29
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly and prices are also 6% lower on average.
Flight from San Francisco to Ontario
(avg. price over the last 2 weeks)
or less
or less

When to book flights with Frontier to Ontario

Average price per month
Flight prices as travel date approaches

FAQs for flying to Ontario with Frontier

  • Is Frontier cheaper than other airlines flying to Ontario?

    Frontier is the cheapest airline flying to Ontario with an average return price of $121. Flights to Ontario with JetBlue cost $408 on average.

  • Which other airlines fly to Ontario?

    Along with Frontier, you can also fly to Ontario with American Airlines, JetBlue, Delta, Hawaiian Airlines and JetBlue.

  • How much is a flight to Ontario with Frontier?

    On average, Frontier flights to Ontario cost $73 for one-way and $121 return.

  • Which airport do Frontier flights to Ontario fly into?

    You’ll fly into Ontario Airport when flying to Ontario with Frontier.

See more FAQs

Top tips for your flights to Ontario with Frontier

  • Looking to fly from the United States to Ontario with Frontier? 25% of our users found flights for the following prices or less: From Las Vegas $29 one-way, $45 round-trip; from El Paso $61 one-way, $98 round-trip.
  • The cheapest flight to Ontario with Frontier found on KAYAK in the last 2 weeks departed from Las Vegas and cost $17.

Frontier customer reviews

6.2
OkayBased on 3,990 verified guest reviews
7.0Crew
5.8Comfort
6.5Boarding
5.1Food
4.9Entertainment

Pros +
Cons -

Traveler rating:
Sort by:
A
7.6 Good
Pros:Everything was good except what I mention below. I would fly again, as your aircraft was clean, and the food/beverage packages had good options, I will just add additional bagage costs to the ticket price to make a determination of whether the flight is worth the price.
Cons:Paying for a carry-on. I would not have booked with frontier had I known I'd have to pay for the very small duffel I brought with me. I could have booked with Delta, had free beverages, and not paid for a carry-on, all for less than what turned out to be the total cost of this frontier flight. It should be clearly stated before booking that ANY bag brought with you would incure a fee. People would factor this into the purchase price and book accordingly.
A
4.0 Mediocre
Pros:The flight departed on time and arrived as scheduled.
Cons:I'm glad that I arrived safely because that is the one thing I can appreciate. The cheap fares equal the quality of the plane. Only 4 rows of 30 have reclining seats. It would be a stretch to say the seats are padded. The clientele is cheaper than the fare with lots of crying babes and impolite guests running to the door as the plane arrives to the gate.
A
4.3 Mediocre
Pros:Staff did a typical job, everyone was nice, nothing notable.
Cons:Frontier airlines is awful. With all the added fees, I could have just booked with Delta or another airline that at least offers their passengers water without charging for it. Or charging for my bag. What a joke. Not worth the "discount" at all and would never bother booking with them again.
L
9.3 Wonderful
Pros:Very nice and flight was smooth
Cons:N/a
A
10.0 Wonderful
Pros:Very professional.
Cons:That it had to end.
A
2.0 Poor
Pros:Nothing
Cons:Everything
A
10.0 Wonderful
Pros:Frontier was on time and their staff was courteous and professional.
A
2.0 Poor
Cons:Rude service
A
5.0 Fair
Cons:Delayed
A
4.0 Mediocre
Cons:No frills to the point of passenger despair. Budget airline to the T.

Book Cheap flights with Frontier to Ontario

Recent round-trip flight deals

6/15Sat
nonstopFrontier
1h 23mSFO-ONT
6/19Wed
nonstopFrontier
1h 28mONT-SFO
$56
8/8Thu
nonstopFrontier
1h 22mSFO-ONT
8/14Wed
nonstopFrontier
1h 26mONT-SFO
$58
8/13Tue
nonstopFrontier
2h 21mPDX-ONT
8/28Wed
nonstopFrontier
2h 13mONT-PDX
$58
7/2Tue
nonstopFrontier
2h 22mDEN-ONT
7/8Mon
nonstopFrontier
2h 20mONT-DEN
$58
7/3Wed
nonstopFrontier
1h 23mSFO-ONT
7/10Wed
nonstopFrontier
1h 25mONT-SFO
$59
8/24Sat
nonstopFrontier
2h 19mDEN-ONT
8/27Tue
nonstopFrontier
2h 21mONT-DEN
$59
7/30Tue
nonstopFrontier
1h 22mSFO-ONT
8/6Tue
nonstopFrontier
1h 26mONT-SFO
$60
7/16Tue
nonstopFrontier
2h 17mDEN-ONT
7/16Tue
nonstopFrontier
2h 20mONT-DEN
$60
7/3Wed
nonstopFrontier
1h 23mSFO-ONT
7/10Wed
nonstopFrontier
1h 25mONT-SFO
$61
9/11Wed
nonstopFrontier
2h 21mPDX-ONT
9/14Sat
nonstopFrontier
2h 13mONT-PDX
$61
10/8Tue
nonstopFrontier
2h 20mDEN-ONT
10/26Sat
nonstopFrontier
2h 31mONT-DEN
$61
8/21Wed
nonstopFrontier
1h 21mSFO-ONT
8/23Fri
nonstopFrontier
1h 26mONT-SFO
$62
6/15Sat
nonstopFrontier
2h 20mDEN-ONT
6/17Mon
nonstopFrontier
2h 20mONT-DEN
$63
7/13Sat
nonstopFrontier
1h 22mSFO-ONT
7/15Mon
nonstopFrontier
1h 26mONT-SFO
$64
7/23Tue
nonstopFrontier
2h 20mPDX-ONT
7/30Tue
nonstopFrontier
2h 13mONT-PDX
$65
6/16Sun
nonstopFrontier
1h 23mSFO-ONT
6/18Tue
nonstopFrontier
1h 27mONT-SFO
$66
7/23Tue
nonstopFrontier
2h 20mPDX-ONT
7/31Wed
nonstopFrontier
2h 13mONT-PDX
$66
7/23Tue
nonstopFrontier
1h 22mSFO-ONT
7/25Thu
nonstopFrontier
1h 26mONT-SFO
$67
7/17Wed
nonstopFrontier
1h 22mSFO-ONT
7/26Fri
nonstopFrontier
1h 26mONT-SFO
$68
7/2Tue
nonstopFrontier
2h 15mPDX-ONT
7/3Wed
nonstopFrontier
2h 15mONT-PDX
$68

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Recent one-way flight deals

6/10Mon
nonstopFrontier
1h 23mSFO-ONT
$28
6/10Mon
nonstopFrontier
2h 22mDEN-ONT
$28
7/3Wed
nonstopFrontier
1h 23mSFO-ONT
$29
6/11Tue
nonstopFrontier
2h 15mPDX-ONT
$29
7/10Wed
nonstopFrontier
2h 17mDEN-ONT
$29
6/22Sat
nonstopFrontier
1h 23mSFO-ONT
$30
6/10Mon
nonstopFrontier
2h 15mPDX-ONT
$30
6/26Wed
nonstopFrontier
2h 22mDEN-ONT
$30
6/10Mon
nonstopFrontier
1h 23mSFO-ONT
$31
7/9Tue
nonstopFrontier
2h 19mDEN-ONT
$31
6/26Wed
nonstopFrontier
1h 23mSFO-ONT
$32
7/30Tue
nonstopFrontier
2h 19mDEN-ONT
$32
6/15Sat
nonstopFrontier
1h 23mSFO-ONT
$34
6/19Wed
nonstopFrontier
2h 15mPDX-ONT
$34
7/31Wed
nonstopFrontier
2h 19mDEN-ONT
$34
8/7Wed
nonstopFrontier
1h 22mSFO-ONT
$35
7/1Mon
nonstopFrontier
1h 23mSFO-ONT
$38
7/8Mon
nonstopFrontier
1h 22mSFO-ONT
$39
10/12Sat
nonstopFrontier
2h 21mPDX-ONT
$39
7/3Wed
nonstopFrontier
2h 22mDEN-ONT
$39

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Flights to Ontario - Frontier

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - United States

Cabin classes:

$447
$478
$193
$35

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