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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 7/2. 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
Sat 7/6
Sat 7/13

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In the last 7 days travelers have searched 43,995,393 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, +41 more

ANA, Aerolineas Argentinas, +42 more

Tuesday

ANA, Aerolineas Argentinas, Aeromexico, +41 more

ANA, Aerolineas Argentinas, +42 more

Wednesday

ANA, Aerolineas Argentinas, Aeromexico, +41 more

ANA, Aerolineas Argentinas, +42 more

Thursday

ANA, Aerolineas Argentinas, Aeromexico, +40 more

ANA, Aerolineas Argentinas, +41 more

Friday

ANA, Aerolineas Argentinas, Aeromexico, +41 more

ANA, Aerolineas Argentinas, +42 more

Saturday

ANA, Aerolineas Argentinas, Aeromexico, +40 more

ANA, Aerolineas Argentinas, +41 more

Sunday

ANA, Aerolineas Argentinas, Aeromexico, +42 more

ANA, Aerolineas Argentinas, +43 more

See more direct flights

Nonstop returns

Washington, D.C. Reagan-National to Illinois

Monday

ANA, Aerolineas Argentinas, Aeromexico, +41 more

ANA, Aerolineas Argentinas, +42 more

Tuesday

ANA, Aerolineas Argentinas, Aeromexico, +41 more

ANA, Aerolineas Argentinas, +42 more

Wednesday

ANA, Aerolineas Argentinas, Aeromexico, +41 more

ANA, Aerolineas Argentinas, +42 more

Thursday

ANA, Aerolineas Argentinas, Aeromexico, +40 more

ANA, Aerolineas Argentinas, +41 more

Friday

ANA, Aerolineas Argentinas, Aeromexico, +41 more

ANA, Aerolineas Argentinas, +42 more

Saturday

ANA, Aerolineas Argentinas, Aeromexico, +40 more

ANA, Aerolineas Argentinas, +41 more

Sunday

ANA, Aerolineas Argentinas, Aeromexico, +42 more

ANA, Aerolineas Argentinas, +43 more

See more direct flights
See more direct flights

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

Recent round-trip flight deals

6/29Sat
1 stopFrontier
15h 05mSTL-DCA
7/2Tue
1 stopFrontier
8h 47mDCA-STL
$162
7/15Mon
1 stopFrontier
25h 04mSTL-DCA
7/18Thu
1 stopFrontier
13h 57mDCA-STL
$168
9/6Fri
nonstopAmerican Airlines
2h 09mSTL-DCA
9/7Sat
nonstopAmerican Airlines
2h 28mDCA-STL
$169
7/3Wed
nonstopUnited Airlines
1h 54mORD-DCA
7/10Wed
nonstopUnited Airlines
2h 10mDCA-ORD
$179
9/5Thu
nonstopAmerican Airlines
1h 53mORD-DCA
9/9Mon
nonstopAmerican Airlines
2h 16mDCA-ORD
$184
7/1Mon
1 stopDelta
5h 37mSTL-DCA
7/5Fri
1 stopDelta
6h 45mDCA-STL
$188
7/2Tue
1 stopDelta
4h 19mORD-DCA
7/4Thu
1 stopDelta
5h 30mDCA-ORD
$188
7/3Wed
1 stopUnited Airlines
4h 50mSTL-DCA
7/10Wed
1 stopUnited Airlines
4h 48mDCA-STL
$198
8/20Tue
1 stopJetBlue
5h 05mORD-DCA
8/28Wed
1 stopJetBlue
7h 42mDCA-ORD
$219
10/7Mon
1 stopJetBlue
6h 46mORD-DCA
10/13Sun
1 stopJetBlue
5h 14mDCA-ORD
$254

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Recent one-way flight deals

7/2Tue
nonstopAmerican Airlines
2h 02mSTL-DCA
$85
7/4Thu
nonstopAmerican Airlines
1h 49mORD-DCA
$85
8/3Sat
1 stopFrontier
10h 04mMDW-DCA
$87
7/22Mon
1 stopFrontier
15h 18mSTL-DCA
$89
7/10Wed
1 stopJetBlue
5h 05mORD-DCA
$92
7/4Thu
1 stopDelta
6h 46mSTL-DCA
$94
7/5Fri
1 stopDelta
3h 26mORD-DCA
$94
7/11Thu
1 stopJetBlue
6h 05mORD-DCA
$127
6/27Thu
1 stopUnited Airlines
4h 50mSTL-DCA
$130
7/9Tue
nonstopUnited Airlines
1h 59mORD-DCA
$130

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Search by price

Last minute flights from Illinois to Reagan-National

Last minute flight, train and bus deals

6/10Mon
multi-stopFrontier
24h 35mSTL-DCA
6/17Mon
multi-stopFrontier
26h 48mDCA-STL
$198
6/10Mon
multi-stopFrontier
14h 43mSTL-DCA
6/18Tue
multi-stopFrontier
8h 47mDCA-STL
$209
6/11Tue
multi-stopAmerican Airlines
4h 13mORD-DCA
6/11Tue
nonstopAmerican Airlines
2h 14mDCA-ORD
$275
6/10Mon
multi-stopAmerican Airlines
4h 26mPIA-DCA
6/17Mon
multi-stopAmerican Airlines
6h 25mDCA-PIA
$296
6/11Tue
multi-stopJetBlue
5h 43mORD-DCA
6/19Wed
multi-stopJetBlue
6h 47mDCA-ORD
$388
6/11Tue
multi-stopJetBlue
5h 43mORD-DCA
6/26Wed
multi-stopJetBlue
9h 17mDCA-ORD
$403
6/10Mon
nonstopUnited Airlines
1h 58mORD-DCA
6/13Thu
multi-stopUnited Airlines
5h 35mDCA-ORD
$431
6/9Sun
nonstopUnited Airlines
1h 53mORD-DCA
6/20Thu
nonstopUnited Airlines
2h 13mDCA-ORD
$443
6/8Sat
multi-stopDelta
5h 20mORD-DCA
6/11Tue
multi-stopDelta
4h 16mDCA-ORD
$480
6/8Sat
multi-stopDelta
5h 45mMDW-DCA
6/11Tue
multi-stopDelta
3h 43mDCA-MDW
$480

Search by stops

Search by airline

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