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$70+ 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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — ORD
août 12 — août 191
mar. 8/12
mar. 8/19
1 adult, Economy
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Cheap 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 août 7, 2025.

Round-trip from

$135
(United Airlines)

One-way from

$70
(American Airlines)

Popular in

April

Cheapest in

September

Average price

$254

Good round-trip deal

$196 or less

Good one-way deal

$167 or less
From Washington, D.C. Reagan-National to Illinois
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One-way flight from Washington, D.C. Reagan-National to Illinois
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Highest demand for flights based on searches. 7% potential increase in price ($20 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($2 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Washington, D.C. Reagan-National to Illinois.
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Price to beat on a one-way flight from Washington, D.C. Reagan-National to Illinois.
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Find 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 août 7, 2025.

This American Airlines deal was found by Cheapflights users on 8/6. 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.
mer. 9/175:08 pmDCA - ORD
Nonstop2h 20mAmerican Airlines
jeu. 9/186:10 amORD - DCA
Nonstop1h 50mAmerican Airlines
Deal found 8/6$135
This Southwest deal was found by Cheapflights users on 8/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 9/138:25 amDCA - MDW
Nonstop2h 00mSouthwest
lun. 9/158:30 pmMDW - DCA
Nonstop1h 55mSouthwest
Deal found 8/7$135
This American Airlines deal was found by Cheapflights users on 8/5. 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.
sam. 11/87:56 pmDCA - ORD
Nonstop2h 20mAmerican Airlines
lun. 11/106:04 amORD - DCA
Nonstop1h 55mAmerican Airlines
Deal found 8/5$136
This Southwest deal was found by Cheapflights users on 8/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/96:05 amDCA - MDW
Nonstop1h 55mSouthwest
sam. 9/135:30 pmMDW - DCA
Nonstop1h 55mSouthwest
Deal found 8/7$139
This United Airlines deal was found by Cheapflights users on 8/6. 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.
sam. 11/110:30 amDCA - ORD
Nonstop2h 21mUnited Airlines
dim. 11/25:00 amORD - DCA
Nonstop1h 58mUnited Airlines
Deal found 8/6$140
This Southwest deal was found by Cheapflights users on 8/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/48:45 pmDCA - MDW
Nonstop2h 10mSouthwest
ven. 11/78:55 pmMDW - DCA
Nonstop1h 45mSouthwest
Deal found 8/7$140
This Southwest deal was found by Cheapflights users on 8/6. 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.
mer. 12/36:05 amDCA - ORD
1 stop7h 10mSouthwest
sam. 12/61:45 pmORD - DCA
1 stop4h 45mSouthwest
Deal found 8/6$142
This Southwest deal was found by Cheapflights users on 8/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 12/32:45 pmDCA - MDW
1 stop6h 45mSouthwest
sam. 12/66:25 amMDW - DCA
1 stop6h 30mSouthwest
Deal found 8/7$142
This United Airlines deal was found by Cheapflights users on 8/6. 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.
sam. 9/136:25 amDCA - ORD
Nonstop2h 14mUnited Airlines
sam. 9/1311:46 amORD - DCA
1 stop6h 19mUnited Airlines
Deal found 8/6$145
This United Airlines deal was found by Cheapflights users on 8/6. 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.
jeu. 10/23:30 pmDCA - ORD
Nonstop2h 13mUnited Airlines
lun. 10/67:00 amORD - DCA
Nonstop1h 58mUnited Airlines
Deal found 8/6$147
This Southwest deal was found by Cheapflights users on 8/6. 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.
jeu. 10/166:00 amDCA - MDW
Nonstop2h 00mSouthwest
lun. 10/208:00 pmMDW - DCA
Nonstop1h 45mSouthwest
Deal found 8/6$147
This United Airlines deal was found by Cheapflights users on 8/5. 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.
dim. 8/317:00 amDCA - ORD
1 stop4h 38mUnited Airlines
mer. 9/312:50 pmORD - DCA
Nonstop2h 01mUnited Airlines
Deal found 8/5$150

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 août 7, 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

lun. 8/25

5:00 pm-6:16 pm

Nonstop2h 16m

Chicago O'Hare Intl

mar. 8/26

3:00 pm-6:03 pm

Nonstop2h 03m

$135

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

sam. 9/13

8:25 am-9:25 am

Nonstop2h 00m

Chicago Midway

lun. 9/15

8:30 pm-11:25 pm

Nonstop1h 55m

$135

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

sam. 11/8

7:56 pm-9:16 pm

Nonstop2h 20m

Chicago O'Hare Intl

lun. 11/10

6:04 am-8:59 am

Nonstop1h 55m

$136

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

mar. 9/9

6:05 am-7:00 am

Nonstop1h 55m

Chicago Midway

sam. 9/13

5:30 pm-8:25 pm

Nonstop1h 55m

$139

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

ven. 9/12

3:30 pm-4:43 pm

Nonstop2h 13m

Chicago O'Hare Intl

mar. 9/16

7:00 am-9:58 am

Nonstop1h 58m

$140

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

mar. 11/4

8:45 pm-9:55 pm

Nonstop2h 10m

Chicago Midway

ven. 11/7

8:55 pm-11:40 pm

Nonstop1h 45m

$140

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

mer. 12/3

6:05 am-12:15 pm

1 stop7h 10m

Chicago O'Hare Intl

sam. 12/6

1:45 pm-7:30 pm

1 stop4h 45m

$142

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

mer. 12/3

2:45 pm-8:30 pm

1 stop6h 45m

Chicago Midway

sam. 12/6

6:25 am-1:55 pm

1 stop6h 30m

$142

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

sam. 9/13

6:00 am-10:35 am

1 stop5h 35m

Chicago O'Hare Intl

mar. 9/16

3:00 pm-6:03 pm

Nonstop2h 03m

$145

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

lun. 8/25

2:00 pm-3:13 pm

Nonstop2h 13m

Chicago O'Hare Intl

jeu. 8/28

3:00 pm-6:03 pm

Nonstop2h 03m

$147

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/6

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, August is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Illinois (average of $245). Flying from Washington, D.C. Reagan-National Airport to Illinois in March is currently the most expensive (average of $321). 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 août 7, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Reagan-National Airport to Illinois as you normally would.

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 août 7, 2025.

The most flights from DCA to USIL are scheduled on a Wednesday (49 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 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 août 7, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.1

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.1

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)
Southwest
8.0
Very good
4,247 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.1

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)
Delta
8.0
Very good
7,987 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.1

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)
United Airlines
7.4
Good
8,916 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.1

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.1

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)

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.

  • 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 $70 on American Airlines. Other airlines that offer cheap prices include United Airlines from $79 and Southwest from $79 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 (100%), Alaska Airlines (77%) or Cathay Pacific (74%) 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 $98. While the most popular route (Washington, D.C. Reagan-National - Chicago O'Hare Intl) can be booked for $123 on average our data indicates $803 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, August is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Illinois (average of $245). Flying from Washington, D.C. Reagan-National Airport to Illinois in March is currently the most expensive (average of $321). 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.
Reagan-National to Boston flights
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Reagan-National to Los Angeles flights
Reagan-National to O'Hare Intl flights
Dulles Intl to Seattle flights
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Dulles Intl to Miami flights
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Baltimore to Fort Lauderdale flights
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Dulles Intl to Los Angeles flights
Dulles Intl to Dallas/Fort Worth flights
Dulles Intl to O'Hare Intl flights
Dulles Intl to Orlando flights
Baltimore to Orlando flights
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Dulles Intl to San Francisco flights
Reagan-National to Miami flights
Baltimore to O'Hare Intl flights
Reagan-National to Orlando flights
Baltimore to Boston flights
Reagan-National to San Francisco flights
Baltimore to Seattle flights
Dulles Intl to Atlanta flights
Baltimore to Hobby flights
Baltimore to Atlanta flights
Baltimore to Los Angeles flights
Dulles Intl to Minneapolis flights
Reagan-National to Minneapolis flights
Reagan-National to Atlanta flights
Dulles Intl to Midway flights
Baltimore to San Francisco flights
Baltimore to Denver flights
Baltimore to Miami flights
Dulles Intl to Denver flights
Dulles Intl to Fort Lauderdale flights
Dulles Intl to New Orleans flights
Dulles Intl to Tampa flights
Reagan-National to Fort Lauderdale flights
Reagan-National to Hobby flights
Baltimore to Minneapolis flights
Dulles Intl to Honolulu flights
Reagan-National to Detroit flights
Dulles Intl to San Diego flights
Reagan-National to Denver flights
Baltimore to New Orleans flights
Dulles Intl to George Bush Intcntl flights
Dulles Intl to Portland 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 août 7, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$99Average$207FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$157Average$389FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$171Average$297FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$191Average$362FlexibilityNo cancel feeOn-time69%

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