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$64+ Cheap flights from Reagan-National (DCA) to Illinois

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 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — ORD
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Cheap flight deals from Reagan-National to Illinois

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

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.
Sun 12/288:00 amDCA - ORD
1 stop17h 12mFrontier
Thu 1/297:41 pmORD - DCA
1 stop16h 21mFrontier
Deal found 12/25$323
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.
Mon 12/298:00 amDCA - ORD
1 stop17h 12mFrontier
Sun 1/1110:07 pmORD - DCA
1 stop13h 54mFrontier
Deal found 12/26$337
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/268:00 amDCA - ORD
1 stop17h 12mFrontier
Thu 1/297:41 pmORD - DCA
1 stop25h 18mFrontier
Deal found 12/25$344
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/262:00 pmDCA - ORD
1 stop11h 12mMultiple Airlines
Fri 1/307:45 amORD - DCA
1 stop7h 34mMultiple Airlines
Deal found 12/26$345
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:00 pmDCA - ORD
1 stop11h 12mFrontier
Mon 1/57:00 amORD - DCA
1 stop8h 59mFrontier
Deal found 12/26$353
This United Airlines deal was found by Cheapflights users on 12/28. 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 12/296:00 pmDCA - PIA
1 stop4h 39mUnited Airlines
Sun 1/46:30 amPIA - DCA
1 stop5h 43mUnited Airlines
Deal found 12/28$354
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:00 pmDCA - MDW
1 stop26h 55mFrontier
Sun 1/410:50 pmMDW - DCA
1 stop13h 11mFrontier
Deal found 12/26$357
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.
Wed 12/315:35 pmDCA - ORD
1 stop16h 26mDelta
Thu 1/15:31 pmORD - DCA
1 stop4h 25mDelta
Deal found 12/25$359
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.
Wed 12/315:35 pmDCA - MDW
1 stop16h 14mDelta
Thu 1/16:08 pmMDW - DCA
1 stop3h 42mDelta
Deal found 12/25$359
This United Airlines deal was found by Cheapflights users on 12/28. 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 12/297:30 amDCA - PIA
1 stop5h 50mUnited Airlines
Sat 1/33:30 pmPIA - DCA
1 stop7h 29mUnited Airlines
Deal found 12/28$369
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 12/308:00 amDCA - ORD
1 stop17h 12mFrontier
Thu 1/17:00 amORD - DCA
1 stop29h 01mFrontier
Deal found 12/25$372
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/298:00 amDCA - ORD
1 stop17h 12mFrontier
Thu 1/17:00 amORD - DCA
1 stop29h 01mFrontier
Deal found 12/25$373

Find flight deals from Reagan-National to Illinois

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

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$162
(Expedia)

One-way from

$64
(Frontier)

Popular in

November

Cheapest in

September

Average price

$283

Good round-trip deal

$312 or less

Good one-way deal

$167 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Chicago (CHI) flights.
Search Deals
From Washington, D.C. Reagan-National to Illinois
Search Deals
One-way flight from Washington, D.C. Reagan-National to Illinois
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 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 Washington, D.C. Reagan-National to Illinois.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Reagan-National to Illinois.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Reagan-National to Illinois 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 Washington, D.C. Reagan-National Airport to Illinois that are best for you.

Fly from

Reagan-National

Fly to

Illinois

Route

Depart

Return

Price

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 1/28

10:05 am-5:43 pm

1 stop8h 38m

Chicago O'Hare Intl

Mon 2/2

8:55 am-5:34 pm

1 stop7h 39m

$197

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Tue 1/27

10:05 am-5:43 pm

1 stop8h 38m

Chicago O'Hare Intl

Wed 2/4

7:45 am-4:19 pm

1 stop7h 34m

$197

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Fri 1/30

11:55 am-5:43 pm

1 stop6h 48m

Chicago O'Hare Intl

Sun 2/1

7:45 am-4:19 pm

1 stop7h 34m

$197

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 1/29

11:55 am-5:43 pm

1 stop6h 48m

Chicago O'Hare Intl

Tue 2/3

7:45 am-4:19 pm

1 stop7h 34m

$197

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Sat 2/7

12:20 pm-5:43 pm

1 stop6h 23m

Chicago O'Hare Intl

Mon 2/9

7:45 am-4:19 pm

1 stop7h 34m

$197

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 1/29

10:05 am-5:43 pm

1 stop8h 38m

Chicago O'Hare Intl

Wed 2/4

7:45 am-2:29 pm

1 stop5h 44m

$197

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Mon 1/26

11:55 am-5:43 pm

1 stop6h 48m

Chicago O'Hare Intl

Fri 1/30

7:45 am-2:29 pm

1 stop5h 44m

$197

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 1/28

11:55 am-5:43 pm

1 stop6h 48m

Chicago O'Hare Intl

Wed 2/4

7:45 am-5:34 pm

1 stop8h 49m

$197

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 1/29

10:05 am-5:43 pm

1 stop8h 38m

Chicago O'Hare Intl

Sun 2/1

7:45 am-2:29 pm

1 stop5h 44m

$197

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Tue 2/10

9:00 pm-10:15 pm

Nonstop2h 15m

Chicago Midway

Sat 2/14

5:55 pm-8:45 pm

Nonstop1h 50m

$208

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 Reagan-National to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Reagan-National 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 Washington, D.C. Reagan-National Airport to Illinois

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

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Illinois (average of $98). Flying from Washington, D.C. Reagan-National Airport to Illinois in December is currently the most expensive (average of $232). 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 DCA to IL?

Find hourly flight availability from Reagan-National to Illinois. 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.

It’s typically best to fly out from Washington, D.C. Reagan-National Airport to Illinois in the evening. Doing so could potentially save you 16% on the flight price compared to flying in the afternoon, which is usually more expensive.

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

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

Travelers seeking maximum savings on their Washington, D.C. Reagan-National Airport to Illinois flight should consider departing on Wednesday evenings 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 Washington, D.C. Reagan-National Airport to Illinois

Explore weekly flight availability from Reagan-National to Illinois. 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 DCA to USIL are scheduled on a Saturday (38 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (26 on average).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated December 28, 2025.
Get a feel of what it's like to fly with Southwest, United Airlines, and American Airlines from Washington, D.C. Reagan-National Airport to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,256 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,256 reviews
Southwest
8.0
Very good
4,256 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,114 reviews
Southwest
8.0
Very good
4,256 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,070 reviews
Southwest
8.0
Very good
4,256 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.8
Fair
3,064 reviews
Southwest
8.0
Very good
4,256 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

Find useful and relevant information for your journey from Reagan-National to Illinois. 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 Washington, D.C. Reagan-National Airport to Illinois?

    For as low as $208, JetBlue can have you in Illinois from Washington, D.C. Reagan-National Airport in 2h 15m. The distance between Washington, D.C. Reagan-National Airport and Illinois is about 599 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    One-way options have recently been found by users for as low as $16 on Frontier. Other airlines that offer cheap prices include American Airlines from $78 and Southwest from $85 one-way.

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

    While some choose either Washington, D.C. Reagan-National - Chicago Midway or Washington, D.C. Reagan-National - Lambert-St Louis, Washington, D.C. Reagan-National - Chicago O'Hare Intl is the most popular route from Washington, D.C. Reagan-National Airport to Illinois.

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

    No one likes to see their flight delayed. When booking a flight from Washington, D.C. Reagan-National Airport to Illinois consider choosing Envoy Air (87%), Royal Jordanian (78%) or ANA (77%) as they are the most reliable in getting you off to your destination on time.

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

    Looking at all options, your cheapest flight can be booked for $134. While the most popular route (Washington, D.C. Reagan-National - Chicago O'Hare Intl) can be booked for $163 on average, our data indicates $829 when flying from Washington, D.C. Reagan-National Airport to Illinois.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Reagan-National to Illinois 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 Washington, D.C. Reagan-National Airport to Illinois?

    Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Illinois (average of $98). Flying from Washington, D.C. Reagan-National Airport to Illinois in December is currently the most expensive (average of $232). 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.

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Alternative routes for Reagan-National to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Reagan-National to Illinois

Discover the top 4 airlines that operate flights from Reagan-National to Illinois. 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$81Average$177FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$154Average$409FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$178Average$306FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$189Average$372FlexibilityNo cancel feeOn-time69%

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