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$99+ 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 7/25. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — ORD
Jul 27 — Aug 31
Mon 7/27
Mon 8/3
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 June 27, 2026.

This Priceline deal was found by Cheapflights users on 6/22. 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 7/101:59 pm
DCA
-
ORD
1 stop7h 53m
Multiple Airlines
Tue 7/1410:56 am
ORD
-
DCA
1 stop6h 00m
Multiple Airlines
Deal found 6/22$246
This American Airlines deal was found by Cheapflights users on 6/24. 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 7/2510:13 am
DCA
-
ORD
Nonstop2h 20m
American Airlines
Sat 8/14:45 pm
ORD
-
DCA
1 stop4h 35m
American Airlines
Deal found 6/24$247
This Southwest deal was found by Cheapflights users on 6/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2711:40 am
DCA
-
MDW
1 stop5h 50m
Southwest
Wed 7/298:55 pm
MDW
-
DCA
Nonstop1h 55m
Southwest
Deal found 6/25$247
This JetBlue deal was found by Cheapflights users on 6/23. 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.
Wed 7/811:00 am
DCA
-
ORD
1 stop9h 31m
JetBlue
Tue 7/1410:56 am
ORD
-
DCA
1 stop6h 00m
JetBlue
Deal found 6/23$248
This JetBlue deal was found by Cheapflights users on 6/26. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/202:25 pm
DCA
-
ORD
1 stop6h 02m
JetBlue
Mon 8/2411:01 am
ORD
-
DCA
1 stop7h 04m
JetBlue
Deal found 6/26$249
This Southwest deal was found by Cheapflights users on 6/22. 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.
Fri 7/319:00 pm
DCA
-
MDW
Nonstop2h 05m
Southwest
Sat 8/19:15 am
MDW
-
DCA
1 stop3h 50m
Southwest
Deal found 6/22$249
This Frontier deal was found by Cheapflights users on 6/24. 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 8/141:59 pm
DCA
-
ORD
1 stop7h 53m
Frontier
Sun 8/169:57 pm
ORD
-
DCA
1 stop13h 54m
Frontier
Deal found 6/24$250
This Orbitz deal was found by Cheapflights users on 6/23. 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.
Thu 8/131:59 pm
DCA
-
ORD
1 stop7h 53m
Multiple Airlines
Tue 8/1811:01 am
ORD
-
DCA
1 stop6h 00m
Multiple Airlines
Deal found 6/23$251
This Super.com deal was found by Cheapflights users on 6/26. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/187:00 am
DCA
-
ORD
1 stop14h 52m
Frontier
Sat 7/259:57 pm
ORD
-
DCA
1 stop13h 54m
Frontier
Deal found 6/26$252
This Southwest deal was found by Cheapflights users on 6/23. 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.
Wed 7/2211:40 am
DCA
-
MDW
2 stops7h 15m
Southwest
Thu 7/236:00 am
MDW
-
DCA
Nonstop1h 45m
Southwest
Deal found 6/23$252
This American Airlines deal was found by Cheapflights users on 6/24. 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.
Fri 8/75:00 am
DCA
-
ORD
1 stop5h 00m
American Airlines
Tue 8/115:55 pm
ORD
-
DCA
Nonstop2h 04m
American Airlines
Deal found 6/24$253
This Southwest deal was found by Cheapflights users on 6/22. 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.
Fri 7/249:00 pm
DCA
-
MDW
Nonstop2h 05m
Southwest
Tue 7/287:50 am
MDW
-
DCA
1 stop6h 45m
Southwest
Deal found 6/22$253

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 June 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$246
(Priceline)

One-way from

$99
(Delta)

Popular in

June

Cheapest in

September

Average price

$354

Good round-trip deal

$299 or less

Good one-way deal

$179 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. 14% potential increase in price ($47 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 27, 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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Thu 7/30

6:55 am-11:00 am

1 stop5h 05m

Chicago Midway

Sat 8/1

5:05 pm-7:55 pm

Nonstop1h 50m

$247

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Wed 7/29

9:30 pm-10:35 pm

Nonstop2h 05m

Chicago Midway

Thu 7/30

5:00 am-1:15 pm

1 stop7h 15m

$247

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 8/26

11:57 am-1:13 pm

Nonstop2h 16m

Chicago O'Hare Intl

Wed 9/2

8:00 am-11:01 am

Nonstop2h 01m

$257

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Sat 8/1

5:29 pm-8:31 pm

1 stop4h 02m

Chicago O'Hare Intl

Sat 8/8

6:40 am-12:47 pm

1 stop5h 07m

$257

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Tue 9/1

12:23 pm-4:17 pm

1 stop4h 54m

Chicago O'Hare Intl

Thu 9/3

1:50 pm-7:34 pm

1 stop4h 44m

$257

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Wed 7/22

6:00 am-9:13 am

1 stop4h 13m

Chicago Midway

Sat 7/25

9:19 am-4:34 pm

1 stop6h 15m

$258

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Wed 8/5

6:00 am-12:05 pm

2 stops7h 05m

Chicago Midway

Sat 8/8

7:45 am-3:15 pm

1 stop6h 30m

$258

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Tue 7/21

1:25 pm-7:15 pm

1 stop6h 50m

Chicago O'Hare Intl

Mon 7/27

10:56 am-7:09 pm

1 stop7h 13m

$263

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Thu 8/20

12:15 pm-3:25 pm

1 stop4h 10m

Chicago Midway

Mon 8/24

5:50 pm-10:55 pm

1 stop4h 05m

$265

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Thu 8/6

5:05 pm-10:40 pm

1 stop6h 35m

Chicago Midway

Mon 8/10

5:30 pm-10:30 pm

1 stop4h 00m

$265

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/26

Showing 1-10 of 60 resultsSorted by cheapest first
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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, January is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Illinois (average of $29). Flying from Washington, D.C. Reagan-National Airport to Illinois in June is currently the most expensive (average of $761). 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 June 27, 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 4% on the flight price compared to flying in the afternoon, which is usually more expensive.

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 June 27, 2026.

The most flights from DCA to USIL are scheduled on a Friday (57 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (17 on average).

How much does it cost to fly round-trip from Washington, D.C. Reagan-National Airport to Illinois?

How far ahead should I book a flight from Washington, D.C. Reagan-National Airport to Illinois?

The price you pay for your flight from Washington, D.C. Reagan-National Airport to Illinois may vary depending on when you book. For the best chance of a lower fare, look to book 47 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 June 20, 2026.

Travelers seeking maximum savings on their Washington, D.C. Reagan-National Airport to Illinois flight should consider departing on Monday at noon when fares are most often at their lowest. Sunday 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 June 27, 2026.
Get a feel of what it's like to fly with Southwest,United Airlines, andAmerican 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
7.9
Good
4,246 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

7.9

Crew

8.6

Food

7.0

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers
Southwest
7.9
Good
4,246 reviews
Southwest
7.9
Good
4,246 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

7.9

Crew

8.6

Food

7.0

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers
United Airlines
7.4
Good
9,896 reviews
Southwest
7.9
Good
4,246 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

7.9

Crew

8.6

Food

7.0

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers
American Airlines
7.1
Good
11,777 reviews
Southwest
7.9
Good
4,246 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

7.9

Crew

8.6

Food

7.0

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers
Frontier
5.6
Fair
2,862 reviews
Southwest
7.9
Good
4,246 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

7.9

Crew

8.6

Food

7.0

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers

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 $257, Southwest can have you in Illinois from Washington, D.C. Reagan-National Airport in 2h 16m. The distance between Washington, D.C. Reagan-National Airport and Illinois is about 610 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 $78 on American Airlines. Other airlines that offer cheap prices include Frontier from $83 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 (97%), Republic Airways (87%) or Cathay Pacific (84%) 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 $105. While the most popular route (Washington, D.C. Reagan-National - Chicago O'Hare Intl) can be booked for $177 on average, our data indicates $950 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, January is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Illinois (average of $29). Flying from Washington, D.C. Reagan-National Airport to Illinois in June is currently the most expensive (average of $761). 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.
Dulles Intl to Seattle flights
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Baltimore to Las Vegas flights
Baltimore to Los Angeles flights
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Dulles Intl to San Francisco flights
Baltimore to Fort Lauderdale flights
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Dulles Intl to Hobby flights
Baltimore to Midway flights
Baltimore to Tampa flights
Dulles Intl to Midway flights
Reagan-National to Minneapolis flights
Dulles Intl to George Bush Intcntl flights
Reagan-National to George Bush Intcntl flights
Dulles Intl to New Orleans flights
Reagan-National to Denver flights
Reagan-National to Tampa flights
Reagan-National to Fort Lauderdale flights
Dulles Intl to San Diego 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 June 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$29Average$130FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$154Average$402FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$189Average$359FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$206Average$356FlexibilityNo cancel feeOn-time63%

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