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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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — ORD
Mar 13 — Mar 201
Fri 3/13
Fri 3/20
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 February 11, 2026.

This United Airlines deal was found by Cheapflights users on 2/8. 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.
Sat 3/77:30 am
DCA
-
ORD
Nonstop2h 20m
United Airlines
Tue 3/107:40 pm
ORD
-
DCA
Nonstop2h 12m
United Airlines
Deal found 2/8$160
This American Airlines deal was found by Cheapflights users on 2/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/73:21 pm
DCA
-
ORD
Nonstop2h 24m
American Airlines
Tue 3/108:58 pm
ORD
-
DCA
Nonstop1h 52m
American Airlines
Deal found 2/9$165
This CheapOair deal was found by Cheapflights users on 2/10. 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 4/161:59 pm
DCA
-
ORD
1 stop20h 51m
Frontier
Sun 4/1910:55 am
ORD
-
DCA
1 stop10h 04m
Frontier
Deal found 2/10$171
This United Airlines deal was found by Cheapflights users on 2/7. 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.
Sat 3/77:00 pm
DCA
-
ORD
Nonstop2h 35m
United Airlines
Sat 3/147:40 pm
ORD
-
DCA
Nonstop2h 12m
United Airlines
Deal found 2/7$175
This United Airlines deal was found by Cheapflights users on 2/8. 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 3/43:30 pm
DCA
-
ORD
Nonstop2h 21m
United Airlines
Sat 3/77:00 am
ORD
-
DCA
Nonstop1h 54m
United Airlines
Deal found 2/8$177
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/226:00 pm
DCA
-
ORD
1 stop16h 50m
Frontier
Fri 4/2410:55 am
ORD
-
DCA
1 stop25h 05m
Frontier
Deal found 2/10$179
This Southwest deal was found by Cheapflights users on 2/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/910:40 am
DCA
-
MDW
Nonstop2h 05m
Southwest
Mon 5/118:10 pm
MDW
-
DCA
Nonstop1h 50m
Southwest
Deal found 2/9$179
This Orbitz deal was found by Cheapflights users on 2/9. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:00 pm
DCA
-
ORD
1 stop16h 50m
Frontier
Fri 4/1710:55 am
ORD
-
DCA
1 stop25h 05m
Frontier
Deal found 2/9$181
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Thu 4/308:20 am
DCA
-
ORD
Nonstop2h 21m
United Airlines
Sat 5/27:00 am
ORD
-
DCA
Nonstop1h 59m
United Airlines
Deal found 2/8$184
This American Airlines deal was found by Cheapflights users on 2/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/111:45 pm
DCA
-
ORD
Nonstop2h 24m
American Airlines
Sat 4/119:01 pm
ORD
-
DCA
Nonstop1h 56m
American Airlines
Deal found 2/8$185
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Sat 2/288:20 am
DCA
-
ORD
Nonstop2h 30m
United Airlines
Tue 3/39:01 pm
ORD
-
DCA
Nonstop1h 58m
United Airlines
Deal found 2/8$188
This American Airlines deal was found by Cheapflights users on 2/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/77:50 pm
DCA
-
ORD
Nonstop2h 25m
American Airlines
Mon 3/98:58 pm
ORD
-
DCA
Nonstop1h 52m
American Airlines
Deal found 2/8$189

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 February 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$160
(United Airlines)

One-way from

$64
(Booking.com)

Popular in

December

Cheapest in

September

Average price

$237

Good round-trip deal

$298 or less

Good one-way deal

$169 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. 4% potential increase in price ($12 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 February 2026
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 February 11, 2026.
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 7/29

6:30 am-7:46 am

Nonstop2h 16m

Chicago O'Hare Intl

Sat 8/1

7:00 am-9:59 am

Nonstop1h 59m

$196

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Sat 3/7

2:00 pm-6:55 pm

1 stop5h 55m

Chicago O'Hare Intl

Tue 3/10

1:57 pm-6:59 pm

1 stop4h 02m

$197

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Sat 4/11

6:40 am-7:45 am

Nonstop2h 05m

Chicago Midway

Tue 4/14

10:15 am-4:10 pm

1 stop4h 55m

$210

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Wed 3/25

3:35 pm-4:50 pm

Nonstop2h 15m

Chicago Midway

Wed 4/8

1:30 pm-4:15 pm

Nonstop1h 45m

$214

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 4/1

6:00 am-9:10 am

1 stop4h 10m

Chicago O'Hare Intl

Wed 4/8

10:40 am-5:00 pm

1 stop5h 20m

$217

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 5/13

6:20 am-10:39 am

1 stop5h 19m

Chicago O'Hare Intl

Wed 5/20

11:07 am-4:33 pm

1 stop4h 26m

$217

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Wed 3/25

7:25 am-12:20 pm

1 stop5h 55m

Chicago Midway

Wed 4/1

10:30 am-6:10 pm

1 stop6h 40m

$217

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Tue 4/7

6:00 pm-7:22 pm

Nonstop2h 22m

Chicago O'Hare Intl

Thu 4/9

7:00 am-9:59 am

Nonstop1h 59m

$221

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 3/11

12:00 pm-1:22 pm

Nonstop2h 22m

Chicago O'Hare Intl

Sat 3/14

7:00 am-9:54 am

Nonstop1h 54m

$221

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Wed 3/11

11:50 am-1:00 pm

Nonstop2h 10m

Chicago Midway

Wed 3/18

3:35 pm-10:55 pm

1 stop6h 20m

$224

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/9

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 $237). 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 February 11, 2026.

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 14% 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 February 7, 2026.

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

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 February 11, 2026.
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
4,280 reviews

Overall

8.0

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

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
4,280 reviews
Southwest
8.0
Very good
4,280 reviews

Overall

8.0

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

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
9,273 reviews
Southwest
8.0
Very good
4,280 reviews

Overall

8.0

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

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
11,265 reviews
Southwest
8.0
Very good
4,280 reviews

Overall

8.0

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

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
5.7
Fair
3,052 reviews
Southwest
8.0
Very good
4,280 reviews

Overall

8.0

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

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 $210, United Airlines can have you in Illinois from Washington, D.C. Reagan-National Airport in 2h 05m. 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 $73 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 SkyWest Airlines (92%), Royal Jordanian (86%) or United Airlines (78%) 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 $115. While the most popular route (Washington, D.C. Reagan-National - Chicago O'Hare Intl) can be booked for $197 on average, our data indicates $856 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 $237). 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

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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.
Baltimore to Fort Lauderdale flights
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Dulles Intl to Seattle flights
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Dulles Intl to Sky Harbor Intl flights
Baltimore to Atlanta flights
Dulles Intl to O'Hare Intl flights
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Dulles Intl to George Bush Intcntl flights
Baltimore to Denver flights
Baltimore to Tampa flights
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Reagan-National to O'Hare Intl flights
Dulles Intl to New Orleans flights
Baltimore to Sky Harbor Intl flights
Reagan-National to New Orleans flights
Reagan-National to San Francisco flights
Baltimore to San Francisco flights
Reagan-National to George Bush Intcntl flights
Dulles Intl to Salt Lake City flights
Reagan-National to West Palm Beach flights
Baltimore to Boston flights
Baltimore to New Orleans flights
Baltimore to George Bush Intcntl flights
Reagan-National to Sky Harbor Intl flights

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 February 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$29Average$130FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$154Average$413FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$179Average$314FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$189Average$345FlexibilityNo cancel feeOn-time69%

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