HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Reagan-National

$61+ 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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — DCA
Dec 12 — Dec 191
Fri 12/12
Fri 12/19
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to Reagan-National with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 November 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$150
(Frontier)

One-way from

$61
(Booking.com)

Popular in

November

Cheapest in

August

Average price

$300

Good round-trip deal

$262 or less

Good one-way deal

$169 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. 8% potential increase in price ($22 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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

Find 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 November 12, 2025.

This Frontier deal was found by Cheapflights users on 11/12. 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.
Mon 12/87:00 amORD - DCA
1 stop13h 59mFrontier
Thu 12/112:00 pmDCA - ORD
1 stop11h 12mFrontier
Deal found 11/12$150
This Frontier deal was found by Cheapflights users on 11/11. 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.
Mon 12/1512:18 pmMDW - DCA
1 stop8h 41mFrontier
Thu 1/88:00 amDCA - MDW
1 stop13h 02mFrontier
Deal found 11/11$150
This CheapOair deal was found by Cheapflights users on 11/10. 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.
Thu 12/187:00 amORD - DCA
1 stop29h 01mFrontier
Wed 1/142:00 pmDCA - ORD
1 stop29h 50mFrontier
Deal found 11/10$186
This Priceline deal was found by Cheapflights users on 11/9. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/228:15 amORD - DCA
1 stop6h 02mJetBlue
Sat 11/226:00 pmDCA - ORD
1 stop5h 21mJetBlue
Deal found 11/9$189
This Booking.com deal was found by Cheapflights users on 11/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:45 pmSTL - DCA
1 stop20h 14mFrontier
Wed 11/192:00 pmDCA - STL
1 stop29h 58mFrontier
Deal found 11/9$192
This KAYAK deal was found by Cheapflights users on 11/11. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/187:00 amORD - DCA
1 stop6h 36mJetBlue
Wed 11/194:55 pmDCA - ORD
1 stop5h 57mJetBlue
Deal found 11/11$192
This JetBlue deal was found by Cheapflights users on 11/12. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/208:20 amORD - DCA
1 stop5h 39mJetBlue
Sat 11/226:00 pmDCA - ORD
1 stop5h 21mJetBlue
Deal found 11/12$195
This Frontier deal was found by Cheapflights users on 11/9. 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.
Thu 11/207:00 amORD - DCA
1 stop8h 57mFrontier
Thu 12/42:00 pmDCA - ORD
1 stop11h 12mFrontier
Deal found 11/9$200
This flygcity.se deal was found by Cheapflights users on 11/10. 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 flygcity.se is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/511:25 amORD - DCA
1 stop5h 39mJetBlue
Mon 12/812:30 pmDCA - ORD
1 stop8h 13mJetBlue
Deal found 11/10$204
This Mytrip deal was found by Cheapflights users on 11/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/57:43 pmSTL - DCA
1 stop16h 23mFrontier
Tue 12/92:00 pmDCA - STL
1 stop21h 14mFrontier
Deal found 11/10$210
This Frontier deal was found by Cheapflights users on 11/10. 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.
Fri 12/57:00 amORD - DCA
1 stop8h 59mFrontier
Mon 12/82:00 pmDCA - ORD
1 stop11h 12mFrontier
Deal found 11/10$210
This CheapOair deal was found by Cheapflights users on 11/10. 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.
Fri 12/512:18 pmMDW - DCA
1 stop8h 41mFrontier
Sat 12/66:00 pmDCA - MDW
1 stop18h 08mFrontier
Deal found 11/10$210

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 November 12, 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

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Mon 11/17

7:45 pm-4:59 pm

1 stop20h 14m

Washington, D.C. Reagan-National

Wed 11/19

2:00 pm-6:58 pm

1 stop29h 58m

$192

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Thu 12/11

1:16 pm-4:59 pm

2 stops26h 43m

Washington, D.C. Reagan-National

Tue 12/16

8:00 am-10:14 am

1 stop27h 14m

$221

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Fri 1/23

7:45 am-2:34 pm

1 stop5h 49m

Washington, D.C. Reagan-National

Sun 1/25

1:00 pm-5:44 pm

1 stop5h 44m

$223

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Thu 2/5

7:45 am-5:35 pm

1 stop8h 50m

Washington, D.C. Reagan-National

Mon 2/9

1:00 pm-5:44 pm

1 stop5h 44m

$223

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Wed 12/17

11:25 am-7:52 pm

1 stop7h 27m

Washington, D.C. Reagan-National

Thu 1/8

11:55 am-5:44 pm

1 stop6h 49m

$223

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Fri 2/6

7:45 am-5:35 pm

1 stop8h 50m

Washington, D.C. Reagan-National

Mon 2/9

10:00 am-5:44 pm

1 stop8h 44m

$223

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Fri 12/19

6:45 am-11:37 am

1 stop3h 52m

Washington, D.C. Reagan-National

Thu 1/1

6:00 am-9:01 am

1 stop4h 01m

$243

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Wed 12/24

6:45 am-12:57 pm

1 stop5h 12m

Washington, D.C. Reagan-National

Thu 1/1

6:00 am-9:01 am

1 stop4h 01m

$243

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Tue 12/23

6:02 pm-10:50 pm

1 stop3h 48m

Washington, D.C. Reagan-National

Tue 12/30

12:32 pm-5:22 pm

1 stop5h 50m

$243

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Thu 12/18

5:30 am-11:37 am

1 stop5h 07m

Washington, D.C. Reagan-National

Wed 12/31

6:00 am-9:01 am

1 stop4h 01m

$243

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/11

Showing 1-10 of 60 results
1
2
3
...
6

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 November is currently the most expensive (average of $210). 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 November 12, 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 in the evening, which can drop the price by up to 20% versus a flight in the morning.

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 16, 2024.

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 November 12, 2025.

The most flights from USIL to DCA are scheduled on a Tuesday (46 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (23 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 3h 52m. Illinois and Washington, D.C. Reagan-National Airport are separated by a distance of 610 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 JetBlue. According to our data, you can fly for as low as $90. Users have also found prices from $119 and $132 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: Alaska Airlines (81%), United Airlines (74%), Air New Zealand (73%).

  • 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 $435, our data shows the cheapest flight currently is $118. When looking at the most popular route, (Chicago O'Hare Intl - Washington, D.C. Reagan-National), you can expect to pay $130 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 November is currently the most expensive (average of $210). 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
Tysons
Woodbridge
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fairfax
Fredericksburg
Falls Church
Linthicum Heights
Manassas
Laurel
Towson
National Harbor
Waldorf
Bowie
Largo
McLean

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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
Los Angeles to Reagan-National flights
Los Angeles to Dulles Intl flights
Los Angeles to Baltimore flights
Boston to Baltimore flights
Dallas/Fort Worth to Baltimore flights
Atlanta to Dulles Intl flights
Boston to Dulles Intl flights
San Francisco to Reagan-National flights
Seattle to Reagan-National flights
O'Hare Intl to Baltimore flights
San Francisco to Dulles Intl flights
O'Hare Intl to Dulles Intl flights
Seattle to Dulles Intl flights
Dallas/Fort Worth to Reagan-National flights
Boston to Reagan-National flights
Hobby to Baltimore flights
Atlanta to Baltimore flights
O'Hare Intl to Reagan-National flights
Atlanta to Reagan-National flights
Denver to Baltimore flights
Denver to Dulles Intl flights
John F Kennedy Intl to Dulles Intl flights
San Francisco to Baltimore flights
Hobby to Reagan-National flights
Tampa to Dulles Intl flights
Detroit to Baltimore flights
Seattle to Baltimore flights
Hobby to Dulles Intl flights
Detroit to Dulles Intl flights
Austin to Dulles Intl flights
Tampa to Baltimore flights
Orlando to Reagan-National flights
John F Kennedy Intl to Reagan-National flights
Miami to Reagan-National flights
George Bush Intcntl to Baltimore flights
Denver to Reagan-National flights
George Bush Intcntl to Dulles Intl flights
Miami to Dulles Intl flights
Orlando to Dulles Intl flights
Midway to Baltimore flights
George Bush Intcntl to Reagan-National flights
Minneapolis to Baltimore flights
Fort Lauderdale to Baltimore flights
Orlando to Baltimore flights
Midway to Dulles Intl flights
Sky Harbor Intl to Dulles Intl flights
LaGuardia to Dulles Intl flights
Fort Lauderdale to Dulles Intl flights
Minneapolis 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 November 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$85Average$168FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$152Average$268FlexibilityNo cancel feeOn-time62%
DeltaCheapest$166Average$248FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$170Average$374FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$192Average$302FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$194Average$339FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.