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$85 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 7/1. 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
Mon 7/1
Mon 7/8

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In the last 7 days travelers have searched 42,787,818 times on KAYAK, and here is why:

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Good to know

Low season

January

High season

May

Cheapest flight

$85
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly with an average 4% 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

7/1Mon
nonstopAmerican Airlines
2h 02mSTL-DCA
7/3Wed
nonstopAmerican Airlines
2h 28mDCA-STL
$169
6/26Wed
nonstopAmerican Airlines
2h 02mSTL-DCA
7/3Wed
nonstopAmerican Airlines
2h 28mDCA-STL
$179
7/3Wed
nonstopUnited Airlines
1h 59mORD-DCA
7/9Tue
nonstopUnited Airlines
2h 13mDCA-ORD
$179
7/1Mon
1 stopDelta
5h 21mSTL-DCA
7/5Fri
1 stopDelta
6h 44mDCA-STL
$188
7/2Tue
1 stopDelta
5h 15mORD-DCA
7/4Thu
1 stopDelta
5h 40mDCA-ORD
$188
6/25Tue
nonstopUnited Airlines
1h 58mORD-DCA
6/26Wed
nonstopUnited Airlines
2h 11mDCA-ORD
$194
6/12Wed
1 stopFrontier
20h 58mSTL-DCA
6/16Sun
1 stopFrontier
27h 29mDCA-STL
$213
9/20Fri
1 stopFrontier
24h 59mSTL-DCA
9/23Mon
1 stopFrontier
17h 51mDCA-STL
$215
6/19Wed
1 stopSouthwest
6h 15mORD-DCA
6/20Thu
2 stopsSouthwest
17h 35mDCA-ORD
$344
6/19Wed
2 stopsSouthwest
13h 50mORD-DCA
6/20Thu
3 stopsSouthwest
9h 50mDCA-ORD
$361

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Recent one-way flight deals

7/1Mon
nonstopAmerican Airlines
2h 02mSTL-DCA
$85
7/4Thu
nonstopUnited Airlines
1h 54mORD-DCA
$85
7/16Tue
1 stopJetBlue
5h 15mORD-DCA
$92
7/1Mon
1 stopDelta
6h 44mSTL-DCA
$94
7/4Thu
1 stopDelta
7h 29mORD-DCA
$94
6/10Mon
1 stopFrontier
14h 43mSTL-DCA
$109
6/19Wed
1 stopFrontier
15h 03mSTL-DCA
$116
8/23Fri
1 stopJetBlue
5h 05mORD-DCA
$127
7/20Sat
nonstopSouthwest
1h 45mMDW-DCA
$127
6/26Wed
1 stopSouthwest
9h 30mORD-DCA
$144

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Last minute flights from Illinois to Reagan-National

Last minute flight, train and bus deals

6/5Wed
multi-stopFrontier
15h 03mSTL-DCA
6/8Sat
multi-stopFrontier
20h 38mDCA-STL
$256
6/5Wed
nonstopAmerican Airlines
1h 49mORD-DCA
6/5Wed
multi-stopAmerican Airlines
5h 15mDCA-ORD
$275
6/5Wed
multi-stopFrontier
24h 55mSTL-DCA
6/12Wed
multi-stopFrontier
26h 39mDCA-STL
$288
6/3Mon
multi-stopAmerican Airlines
4h 16mORD-DCA
6/3Mon
nonstopAmerican Airlines
2h 22mDCA-ORD
$300
6/6Thu
multi-stopJetBlue
5h 43mORD-DCA
6/10Mon
multi-stopJetBlue
6h 50mDCA-ORD
$444
6/5Wed
nonstopUnited Airlines
1h 54mORD-DCA
6/5Wed
nonstopUnited Airlines
2h 10mDCA-ORD
$464
6/4Tue
multi-stopDelta
5h 05mORD-DCA
6/11Tue
multi-stopDelta
4h 39mDCA-ORD
$480
6/5Wed
multi-stopDelta
4h 35mORD-DCA
6/11Tue
multi-stopDelta
5h 26mDCA-ORD
$488
6/5Wed
multi-stopJetBlue
6h 03mORD-DCA
6/10Mon
multi-stopJetBlue
6h 50mDCA-ORD
$489
6/6Thu
nonstopUnited Airlines
1h 54mORD-DCA
6/9Sun
nonstopUnited Airlines
2h 12mDCA-ORD
$490

Search by stops

Search by airline

Search by price