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Find cheap flights from Illinois to Reagan Washington National Airport from $59

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 5/23. 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
Sun 6/9
Sun 6/16

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In the last 7 days travelers have searched 43,895,468 times on KAYAK, and here is why:

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Good to know

Low season

January

High season

May

Cheapest flight

$59
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly and prices are also 0% lower on average.
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

6/17Mon
1 stopFrontier
14h 43mSTL-DCA
6/22Sat
1 stopFrontier
20h 38mDCA-STL
$154
6/12Wed
1 stopFrontier
15h 03mSTL-DCA
6/23Sun
1 stopFrontier
21h 30mDCA-STL
$156
5/31Fri
nonstopAmerican Airlines
1h 59mSTL-DCA
6/4Tue
nonstopAmerican Airlines
2h 15mDCA-STL
$169
5/30Thu
nonstopAmerican Airlines
1h 47mORD-DCA
6/4Tue
nonstopAmerican Airlines
2h 11mDCA-ORD
$169
8/10Sat
nonstopUnited Airlines
1h 58mORD-DCA
8/14Wed
nonstopUnited Airlines
2h 13mDCA-ORD
$179
5/30Thu
nonstopUnited Airlines
1h 58mORD-DCA
6/3Mon
nonstopUnited Airlines
2h 13mDCA-ORD
$184
7/1Mon
1 stopDelta
6h 44mSTL-DCA
7/5Fri
1 stopDelta
7h 19mDCA-STL
$188
5/30Thu
1 stopDelta
4h 45mORD-DCA
5/31Fri
1 stopDelta
6h 08mDCA-ORD
$188
6/19Wed
1 stopSouthwest
6h 40mORD-DCA
6/20Thu
1 stopSouthwest
7h 50mDCA-ORD
$300
6/19Wed
1 stopSouthwest
11h 30mORD-DCA
6/20Thu
3 stopsSouthwest
18h 10mDCA-ORD
$391

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Recent one-way flight deals

5/23Thu
1 stopFrontier
21h 53mSTL-DCA
$59
5/30Thu
1 stopFrontier
11h 57mSTL-DCA
$81
7/16Tue
nonstopAmerican Airlines
2h 11mORD-DCA
$84
5/30Thu
nonstopAmerican Airlines
1h 59mSTL-DCA
$85
6/5Wed
1 stopDelta
4h 27mSTL-DCA
$94
5/31Fri
1 stopDelta
4h 58mORD-DCA
$94
8/10Sat
nonstopUnited Airlines
1h 58mORD-DCA
$95
5/26Sun
nonstopUnited Airlines
1h 59mORD-DCA
$106
7/16Tue
1 stopJetBlue
5h 16mORD-DCA
$127
5/25Sat
1 stopJetBlue
5h 01mORD-DCA
$164

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Last minute flights from Illinois to Reagan-National

Last minute flight, train and bus deals

5/15Wed
multi-stopFrontier
16h 36mORD-DCA
6/5Wed
multi-stopFrontier
8h 55mDCA-ORD
$268
5/15Wed
multi-stopFrontier
16h 36mORD-DCA
6/3Mon
multi-stopFrontier
19h 13mDCA-ORD
$274
5/15Wed
multi-stopFrontier
16h 36mORD-DCA
5/31Fri
multi-stopFrontier
19h 13mDCA-ORD
$305
5/14Tue
nonstopAmerican Airlines
1h 47mORD-DCA
5/26Sun
nonstopAmerican Airlines
2h 15mDCA-ORD
$319
5/14Tue
multi-stopAmerican Airlines
4h 22mORD-DCA
5/26Sun
nonstopAmerican Airlines
2h 11mDCA-ORD
$327
5/15Wed
nonstopAmerican Airlines
1h 47mORD-DCA
6/3Mon
nonstopAmerican Airlines
2h 20mDCA-ORD
$334
5/14Tue
multi-stopDelta
4h 24mORD-DCA
6/4Tue
multi-stopDelta
4h 38mDCA-ORD
$338
5/11Sat
multi-stopDelta
5h 10mORD-DCA
6/3Mon
multi-stopDelta
4h 43mDCA-ORD
$353
5/14Tue
nonstopUnited Airlines
1h 54mORD-DCA
5/14Tue
nonstopUnited Airlines
2h 11mDCA-ORD
$533
5/10Fri
multi-stopUnited Airlines
4h 50mSTL-DCA
5/19Sun
multi-stopUnited Airlines
5h 59mDCA-STL
$579

Search by stops

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