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$76 Find cheap flights from Illinois to Reagan Washington National Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Reagan-National departing on 6/4. 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
sex 6/14
sex 6/21

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In the last 7 days travelers have searched 42,393,389 times on KAYAK, and here is why:

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Good to know

Low season

January

High season

May

Cheapest flight

$76
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly with an average 1% increase in price.
Flight from St. Louis to Reagan Washington National Airport

FAQs for booking Illinois to Reagan Washington National Airport flights

  • How does KAYAK find such low prices on flights from Illinois to Reagan Washington National Airport?

    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 Illinois to Reagan Washington National Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Reagan Washington National Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Reagan Washington National Airport from Illinois 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 Illinois to Reagan Washington National Airport?

    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 Reagan Washington National Airport with an airline and back to Illinois with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Reagan Washington National Airport?

    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 Reagan Washington National Airport from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Prefer to fly non-stop from Illinois to Reagan Washington National Airport?

Find which airlines fly direct from Illinois to Reagan-National, which days they fly and book direct flights.

Nonstop departures

Illinois to Washington, D.C. Reagan-National

Monday

ANA, Aerolineas Argentinas, Aeromexico, +42 more

ANA, Aerolineas Argentinas, +43 more

Tuesday

ANA, Aerolineas Argentinas, Aeromexico, +42 more

ANA, Aerolineas Argentinas, +43 more

Wednesday

ANA, Aerolineas Argentinas, Aeromexico, +42 more

ANA, Aerolineas Argentinas, +43 more

Thursday

ANA, Aerolineas Argentinas, Aeromexico, +41 more

ANA, Aerolineas Argentinas, +42 more

Friday

ANA, Aerolineas Argentinas, Aeromexico, +42 more

ANA, Aerolineas Argentinas, +43 more

Saturday

ANA, Aerolineas Argentinas, Aeromexico, +41 more

ANA, Aerolineas Argentinas, +42 more

Sunday

ANA, Aerolineas Argentinas, Aeromexico, +43 more

ANA, Aerolineas Argentinas, +44 more

See more direct flights

Nonstop returns

Washington, D.C. Reagan-National to Illinois

Monday

ANA, Aerolineas Argentinas, Aeromexico, +42 more

ANA, Aerolineas Argentinas, +43 more

Tuesday

ANA, Aerolineas Argentinas, Aeromexico, +42 more

ANA, Aerolineas Argentinas, +43 more

Wednesday

ANA, Aerolineas Argentinas, Aeromexico, +42 more

ANA, Aerolineas Argentinas, +43 more

Thursday

ANA, Aerolineas Argentinas, Aeromexico, +41 more

ANA, Aerolineas Argentinas, +42 more

Friday

ANA, Aerolineas Argentinas, Aeromexico, +42 more

ANA, Aerolineas Argentinas, +43 more

Saturday

ANA, Aerolineas Argentinas, Aeromexico, +41 more

ANA, Aerolineas Argentinas, +42 more

Sunday

ANA, Aerolineas Argentinas, Aeromexico, +43 more

ANA, Aerolineas Argentinas, +44 more

See more direct flights
See more direct flights

Book cheap flights from Illinois to Washington, D.C.

Recent round-trip flight deals

8/15qui
1 stopFrontier
25h 16mSTL-DCA
8/19seg
1 stopFrontier
29h 50mDCA-STL
$147
6/12qua
1 stopFrontier
15h 03mSTL-DCA
6/17seg
1 stopFrontier
20h 48mDCA-STL
$149
6/3seg
1 stopFrontier
14h 59mSTL-DCA
6/4ter
1 stopFrontier
15h 32mDCA-STL
$153
9/1dom
nonstopUnited Airlines
1h 52mORD-DCA
9/4qua
nonstopUnited Airlines
2h 10mDCA-ORD
$169
9/1dom
nonstopUnited Airlines
1h 52mORD-DCA
9/4qua
1 stopUnited Airlines
5h 48mDCA-ORD
$179
5/29qua
nonstopAmerican Airlines
1h 45mORD-DCA
5/30qui
nonstopAmerican Airlines
2h 15mDCA-ORD
$183
8/15qui
nonstopAmerican Airlines
1h 52mORD-DCA
8/20ter
nonstopAmerican Airlines
2h 11mDCA-ORD
$184
7/9ter
1 stopDelta
6h 53mORD-DCA
7/16ter
1 stopDelta
5h 19mDCA-ORD
$188
9/1dom
1 stopDelta
7h 08mMDW-DCA
9/4qua
1 stopDelta
5h 04mDCA-MDW
$188
10/30qua
1 stopJetBlue
7h 10mORD-DCA
11/1sex
1 stopJetBlue
5h 39mDCA-ORD
$360

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Recent one-way flight deals

6/4ter
1 stopFrontier
12h 17mSTL-DCA
$76
6/5qua
1 stopFrontier
20h 58mSTL-DCA
$85
6/18ter
nonstopAmerican Airlines
1h 49mORD-DCA
$85
5/31sex
1 stopDelta
5h 00mORD-DCA
$94
6/19qua
1 stopDelta
4h 24mMDW-DCA
$94
8/13ter
nonstopAmerican Airlines
1h 51mORD-DCA
$95
6/5qua
nonstopUnited Airlines
1h 58mORD-DCA
$100
6/4ter
nonstopUnited Airlines
1h 59mORD-DCA
$103
6/13qui
1 stopJetBlue
5h 15mORD-DCA
$127
5/29qua
1 stopJetBlue
6h 03mORD-DCA
$164

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Last minute flights from Illinois to Reagan-National

Last minute flight, train and bus deals

5/17sex
nonstopAmerican Airlines
1h 45mORD-DCA
5/17sex
multi-stopAmerican Airlines
4h 13mDCA-ORD
$335
5/20seg
multi-stopFrontier
14h 59mSTL-DCA
5/27seg
multi-stopFrontier
19h 12mDCA-STL
$357
5/16qui
nonstopAmerican Airlines
1h 47mORD-DCA
5/16qui
multi-stopAmerican Airlines
4h 29mDCA-ORD
$365
5/16qui
multi-stopFrontier
21h 53mSTL-DCA
5/19dom
multi-stopFrontier
16h 32mDCA-STL
$387
5/20seg
multi-stopSouthwest
7h 00mORD-DCA
5/23qui
multi-stopSouthwest
6h 30mDCA-ORD
$415
5/20seg
multi-stopSouthwest
6h 20mORD-DCA
5/23qui
multi-stopSouthwest
6h 30mDCA-ORD
$419
5/18sáb
multi-stopDelta
3h 48mORD-DCA
5/26dom
multi-stopDelta
3h 37mDCA-ORD
$443
5/17sex
multi-stopUnited Airlines
3h 55mMLI-DCA
5/19dom
multi-stopUnited Airlines
4h 23mDCA-MLI
$460
5/18sáb
nonstopUnited Airlines
1h 52mORD-DCA
5/19dom
nonstopUnited Airlines
2h 11mDCA-ORD
$485
5/16qui
multi-stopDelta
5h 09mMDW-DCA
5/18sáb
multi-stopDelta
5h 57mDCA-MDW
$504

Search by stops

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