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Reagan-National

$70+ Cheap flights from Illinois to Reagan-National (DCA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/21. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — DCA
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Cheap flight deals from Illinois to Reagan-National

Cheapest flights from Illinois to Reagan-National
Explore the most affordable flight options available from Illinois to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

This United Airlines deal was found by Cheapflights users on 12/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/291:00 pmMLI - DCA
1 stop6h 59mUnited Airlines
Sun 1/412:00 pmDCA - MLI
1 stop5h 54mUnited Airlines
Deal found 12/25$354
This United Airlines deal was found by Cheapflights users on 12/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:30 amMLI - DCA
1 stop4h 28mUnited Airlines
Sat 1/36:00 pmDCA - MLI
1 stop4h 21mUnited Airlines
Deal found 12/25$424
This United Airlines deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:30 amMLI - DCA
1 stop4h 28mUnited Airlines
Fri 1/25:00 pmDCA - MLI
1 stop5h 21mUnited Airlines
Deal found 12/27$439
This United Airlines deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:19 pmPIA - DCA
1 stop5h 40mUnited Airlines
Fri 1/26:30 amDCA - PIA
1 stop6h 50mUnited Airlines
Deal found 12/27$439
This Orbitz deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:00 amORD - DCA
1 stop13h 59mFrontier
Wed 12/312:00 pmDCA - ORD
1 stop11h 12mFrontier
Deal found 12/26$442
This CheapOair deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2810:50 pmMDW - DCA
1 stop22h 09mFrontier
Tue 12/308:00 amDCA - MDW
1 stop12h 55mFrontier
Deal found 12/26$463
This Expedia deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:00 amORD - DCA
1 stop29h 01mFrontier
Thu 1/18:00 amDCA - ORD
1 stop17h 12mFrontier
Deal found 12/26$467
This Frontier deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2810:50 pmMDW - DCA
1 stop13h 11mFrontier
Mon 1/198:00 amDCA - MDW
1 stop12h 54mFrontier
Deal found 12/26$482
This CheapOair deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/287:00 amORD - DCA
1 stop8h 59mFrontier
Tue 12/308:00 amDCA - ORD
1 stop17h 12mFrontier
Deal found 12/26$488
This United Airlines deal was found by Cheapflights users on 12/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/286:30 amMLI - DCA
1 stop4h 28mUnited Airlines
Sun 1/46:00 pmDCA - MLI
1 stop4h 21mUnited Airlines
Deal found 12/25$489
This Expedia deal was found by Cheapflights users on 12/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:00 amORD - DCA
1 stop13h 59mMultiple Airlines
Sun 1/411:20 amDCA - ORD
1 stop8h 26mMultiple Airlines
Deal found 12/25$509
This Delta deal was found by Cheapflights users on 12/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/275:50 amMLI - DCA
1 stop6h 07mDelta
Sun 1/410:20 amDCA - MLI
1 stop6h 56mDelta
Deal found 12/25$513

Find flight deals from Illinois to Reagan-National

Keep the following information in mind while searching for Illinois to Reagan-National flight deals. Data was last updated December 28, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$156
(lastminute.com)

One-way from

$70
(Booking.com)

Popular in

November

Cheapest in

August

Average price

$241

Good round-trip deal

$310 or less

Good one-way deal

$164 or less
Provider with most accurate pricing for Chicago (CHI)-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Washington, D.C. (WAS) flights.
Search Deals
From Illinois to Washington, D.C. Reagan-National
Search Deals
One-way flight from Illinois to Washington, D.C. Reagan-National
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Illinois to Washington, D.C. Reagan-National.
Search Deals
Price to beat on a one-way flight from Illinois to Washington, D.C. Reagan-National.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Reagan-National that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 28, 2025.
Use the filters below to find and compare flights from Illinois to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Illinois

Fly to

Reagan-National

Route

Depart

Return

Price

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Thu 1/22

7:41 pm-1:02 pm

1 stop16h 21m

Washington, D.C. Reagan-National

Thu 1/29

8:00 am-6:31 pm

1 stop11h 31m

$162

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Thu 1/22

7:45 am-2:29 pm

1 stop5h 44m

Washington, D.C. Reagan-National

Mon 1/26

11:55 am-5:43 pm

1 stop6h 48m

$197

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Thu 1/15

7:45 am-2:29 pm

1 stop5h 44m

Washington, D.C. Reagan-National

Thu 1/22

11:55 am-5:43 pm

1 stop6h 48m

$197

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Thu 2/5

7:45 am-5:34 pm

1 stop8h 49m

Washington, D.C. Reagan-National

Sat 2/7

12:20 pm-5:43 pm

1 stop6h 23m

$197

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Sun 1/25

7:45 am-2:29 pm

1 stop5h 44m

Washington, D.C. Reagan-National

Fri 2/6

11:55 am-5:43 pm

1 stop6h 48m

$197

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Tue 3/10

10:00 am-5:50 pm

1 stop6h 50m

Washington, D.C. Reagan-National

Tue 4/28

4:59 pm-9:36 pm

1 stop5h 37m

$197

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Sat 1/31

7:45 am-2:29 pm

1 stop5h 44m

Washington, D.C. Reagan-National

Mon 2/2

11:55 am-5:43 pm

1 stop6h 48m

$197

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Wed 3/11

10:00 am-6:55 pm

1 stop7h 55m

Washington, D.C. Reagan-National

Mon 3/16

11:55 am-5:24 pm

1 stop6h 29m

$197

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Thu 2/5

7:45 am-4:19 pm

1 stop7h 34m

Washington, D.C. Reagan-National

Mon 2/9

10:05 am-5:43 pm

1 stop8h 38m

$197

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Thu 1/22

7:45 am-5:34 pm

1 stop8h 49m

Washington, D.C. Reagan-National

Thu 1/29

10:05 am-5:43 pm

1 stop8h 38m

$197

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/27

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Reagan-National

Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Washington, D.C. Reagan-National Airport

What is the cheapest month to book a flight from Illinois to Washington, D.C. Reagan-National Airport?

Currently, June is the cheapest month in which you can book a flight from Illinois to Washington, D.C. Reagan-National Airport (average of $130). Flying from Illinois to Washington, D.C. Reagan-National Airport in May is currently the most expensive (average of $195). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to DCA?

Find hourly flight availability from Illinois to Reagan-National. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 28, 2025.

When flying from Illinois to Washington, D.C. Reagan-National Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 5% versus a flight in the afternoon.

What is the cheapest day to fly from Illinois to Washington, D.C. Reagan-National Airport?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Reagan-National. Price data was last updated on December 27, 2025.

Travelers seeking maximum savings on their Illinois to Washington, D.C. Reagan-National Airport flight should consider departing on Thursday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Illinois to Washington, D.C. Reagan-National Airport

Explore weekly flight availability from Illinois to Reagan-National. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated December 28, 2025.

The most flights from USIL to DCA are scheduled on a Friday (40 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (25 on average).

Related info for your journey

Find useful and relevant information for your journey from Illinois to Reagan-National. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Illinois to Washington, D.C. Reagan-National Airport?

    Departing from Illinois to Washington, D.C. Reagan-National Airport will take you 1h 55m. Illinois and Washington, D.C. Reagan-National Airport are separated by a distance of 599 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Illinois to Washington, D.C. Reagan-National Airport one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $49. Users have also found prices from $79 and $81 on Southwest and American Airlines, respectively.

  • What are the most popular routes from Illinois to Washington, D.C. Reagan-National Airport?

    The most popular flight routes from Illinois to Washington, D.C. Reagan-National Airport are Chicago O'Hare Intl - Washington, D.C. Reagan-National, Chicago Midway - Washington, D.C. Reagan-National and Lambert-St Louis - Washington, D.C. Reagan-National.

  • What are the most reliable airlines from Illinois to Washington, D.C. Reagan-National Airport?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Illinois to Washington, D.C. Reagan-National Airport on time: Envoy Air (74%), Alaska Airlines (71%), United Airlines (70%).

  • What are the cheapest flights from Illinois to Washington, D.C. Reagan-National Airport?

    While on average a flight from Illinois to Washington, D.C. Reagan-National Airport is generally $694, our data shows the cheapest flight currently is $111. When looking at the most popular route, (Chicago O'Hare Intl - Washington, D.C. Reagan-National), you can expect to pay $163 for that flight.

  • Can I find deals for flights from Illinois to Reagan-National that include hotel bookings?

    Yes. In addition to deals on Illinois to Reagan-National flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Reagan-National?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Reagan-National.

  • Can I find deals for business class flights from Illinois to Reagan-National?

    Yes. Cheapflights offers flight deals from Illinois to Reagan-National by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Washington, D.C. Reagan-National Airport?

    Currently, June is the cheapest month in which you can book a flight from Illinois to Washington, D.C. Reagan-National Airport (average of $130). Flying from Illinois to Washington, D.C. Reagan-National Airport in May is currently the most expensive (average of $195). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Washington, D.C. Reagan-National Airport?

Book flights to Washington, D.C. Reagan-National Airport if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fredericksburg
Linthicum Heights
Rockville
Laurel
Towson
Manassas
National Harbor
Bowie
Largo
McLean
Clinton
Cordova

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Illinois to Reagan-National

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to Dulles Intl flights
Dallas/Fort Worth to Baltimore flights
Atlanta to Baltimore flights
Los Angeles to Reagan-National flights
Atlanta to Dulles Intl flights
Dallas/Fort Worth to Reagan-National flights
Los Angeles to Baltimore flights
Los Angeles to Dulles Intl flights
O'Hare Intl to Baltimore flights
Atlanta to Reagan-National flights
Seattle to Reagan-National flights
Boston to Reagan-National flights
Boston to Baltimore flights
O'Hare Intl to Dulles Intl flights
Orlando to Dulles Intl flights
O'Hare Intl to Reagan-National flights
Boston to Dulles Intl flights
Hobby to Reagan-National flights
San Francisco to Reagan-National flights
Orlando to Baltimore flights
San Francisco to Dulles Intl flights
Tampa to Dulles Intl flights
Fort Lauderdale to Baltimore flights
Minneapolis to Reagan-National flights
Hobby to Dulles Intl flights
Orlando to Reagan-National flights
San Francisco to Baltimore flights
Seattle to Dulles Intl flights
Seattle to Baltimore flights
John F Kennedy Intl to Reagan-National flights
Denver to Baltimore flights
Hobby to Baltimore flights
Miami to Dulles Intl flights
Denver to Dulles Intl flights
Baton Rouge to Reagan-National flights
Tampa to Reagan-National flights
Detroit to Dulles Intl flights
Minneapolis to Baltimore flights
Minneapolis to Dulles Intl flights
Miami to Baltimore flights
Tampa to Baltimore flights
Baton Rouge to Dulles Intl flights
LaGuardia to Reagan-National flights
George Bush Intcntl to Dulles Intl flights
Denver to Reagan-National flights
George Bush Intcntl to Baltimore flights
George Bush Intcntl to Reagan-National flights
Sky Harbor Intl to Dulles Intl flights
Detroit to Baltimore flights
Miami to Reagan-National flights

Top 6 airlines flying from Illinois to Reagan-National

Discover the top 6 airlines that operate flights from Illinois to Reagan-National. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$85Average$180FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$141Average$254FlexibilityNo cancel feeOn-time62%
DeltaCheapest$166Average$196FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$168Average$380FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$191Average$292FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$194Average$339FlexibilityNo cancel feeOn-time69%

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