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$89+ 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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — ORD
ago. 2 — ago. 91
sáb. 8/2
sáb. 8/9
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 julio 28, 2025.

Round-trip from

$157
(American Airlines)

One-way from

$89
(Southwest)

Popular in

April

Cheapest in

September

Average price

$266

Good round-trip deal

$220 or less

Good one-way deal

$155 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 ($19 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julio 28, 2025.

This American Airlines deal was found by Cheapflights users on 7/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/2610:09 pmDCA - ORD
Nonstop2h 16mAmerican Airlines
mié. 8/275:21 pmORD - DCA
Nonstop1h 55mAmerican Airlines
Deal found 7/26$157
This Southwest deal was found by Cheapflights users on 7/25. 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.
mié. 9/173:15 pmDCA - MDW
Nonstop2h 10mSouthwest
lun. 9/298:30 pmMDW - DCA
Nonstop1h 55mSouthwest
Deal found 7/25$157
This Southwest deal was found by Cheapflights users on 7/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/36:00 amDCA - ORD
1 stop7h 45mSouthwest
sáb. 9/62:55 pmORD - DCA
1 stop5h 00mSouthwest
Deal found 7/26$177
This American Airlines deal was found by Cheapflights users on 7/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/162:56 pmDCA - STL
Nonstop2h 18mAmerican Airlines
lun. 8/186:02 amSTL - DCA
Nonstop2h 01mAmerican Airlines
Deal found 7/25$179
This Southwest deal was found by Cheapflights users on 7/25. 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.
sáb. 8/166:40 pmDCA - STL
Nonstop2h 10mSouthwest
lun. 8/188:00 amSTL - DCA
1 stop5h 40mSouthwest
Deal found 7/25$189
This Delta deal was found by Cheapflights users on 7/25. 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.
mar. 8/264:00 pmDCA - ORD
1 stop7h 37mDelta
jue. 8/287:05 amORD - DCA
1 stop6h 45mDelta
Deal found 7/25$197
This Delta deal was found by Cheapflights users on 7/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/166:00 amDCA - MDW
1 stop3h 35mDelta
sáb. 8/166:17 pmMDW - DCA
1 stop3h 42mDelta
Deal found 7/26$197
This Delta deal was found by Cheapflights users on 7/25. 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.
sáb. 8/164:05 pmDCA - STL
1 stop6h 57mDelta
lun. 8/181:26 pmSTL - DCA
1 stop6h 21mDelta
Deal found 7/25$199
This JetBlue deal was found by Cheapflights users on 7/28. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/36:25 amDCA - ORD
1 stop6h 45mJetBlue
sáb. 9/69:51 amORD - DCA
1 stop7h 14mJetBlue
Deal found 7/28$203
This Gotogate deal was found by Cheapflights users on 7/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/166:00 pmDCA - ORD
1 stop7h 32mFrontier
sáb. 8/237:00 amORD - DCA
1 stop8h 59mFrontier
Deal found 7/27$218
This CheapOair deal was found by Cheapflights users on 7/25. 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.
mar. 7/297:00 amDCA - STL
1 stop27h 11mFrontier
mié. 7/307:29 pmSTL - DCA
1 stop15h 35mFrontier
Deal found 7/25$219
This United Airlines deal was found by Cheapflights users on 7/28. 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.
sáb. 8/306:25 amDCA - MLI
1 stop4h 45mUnited Airlines
mar. 9/26:30 amMLI - DCA
1 stop5h 29mUnited Airlines
Deal found 7/28$224

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 julio 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

mar. 8/26

10:09 pm-11:25 pm

Nonstop2h 16m

Chicago O'Hare Intl

mié. 8/27

5:21 pm-8:16 pm

Nonstop1h 55m

$157

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

mié. 9/17

3:15 pm-4:25 pm

Nonstop2h 10m

Chicago Midway

lun. 9/29

8:30 pm-11:25 pm

Nonstop1h 55m

$157

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

mié. 9/3

6:00 am-12:45 pm

1 stop7h 45m

Chicago O'Hare Intl

sáb. 9/6

2:55 pm-8:55 pm

1 stop5h 00m

$177

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

sáb. 8/16

2:56 pm-4:14 pm

Nonstop2h 18m

Lambert-St Louis

lun. 8/18

6:02 am-9:03 am

Nonstop2h 01m

$179

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

sáb. 8/16

6:40 pm-7:50 pm

Nonstop2h 10m

Lambert-St Louis

lun. 8/18

8:00 am-2:40 pm

1 stop5h 40m

$189

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

mar. 8/26

4:00 pm-10:37 pm

1 stop7h 37m

Chicago O'Hare Intl

jue. 8/28

7:05 am-2:50 pm

1 stop6h 45m

$197

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

sáb. 8/16

6:00 am-8:35 am

1 stop3h 35m

Chicago Midway

sáb. 8/16

6:17 pm-10:59 pm

1 stop3h 42m

$197

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

sáb. 8/16

4:05 pm-10:02 pm

1 stop6h 57m

Lambert-St Louis

lun. 8/18

1:26 pm-8:47 pm

1 stop6h 21m

$199

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

mié. 9/3

6:25 am-12:10 pm

1 stop6h 45m

Chicago O'Hare Intl

sáb. 9/6

9:51 am-6:05 pm

1 stop7h 14m

$203

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

mar. 8/12

1:00 pm-12:32 am

1 stop12h 32m

Chicago O'Hare Intl

sáb. 8/16

7:00 am-9:57 pm

1 stop13h 57m

$218

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/25

Showing 1-10 of 49 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 julio 28, 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 julio 28, 2025.

The most flights from DCA to USIL are scheduled on a Monday (49 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (25 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 julio 28, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United 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
4,237 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,237 reviews
Southwest
8.0
Very good
4,237 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,971 reviews
Southwest
8.0
Very good
4,237 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,893 reviews
Southwest
8.0
Very good
4,237 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
JetBlue
7.3
Good
2,913 reviews
Southwest
8.0
Very good
4,237 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,237 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

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 $89 on Southwest. Other airlines that offer cheap prices include American Airlines from $91 and Delta from $99 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%), Japan Airlines (81%) or ANA (76%) 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 $93. While the most popular route (Washington, D.C. Reagan-National - Chicago O'Hare Intl) can be booked for $169 on average our data indicates $1,441 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.
Dulles Intl to O'Hare Intl flights
Reagan-National to Seattle flights
Baltimore to Las Vegas flights
Reagan-National to O'Hare Intl flights
Baltimore to Fort Lauderdale flights
Dulles Intl to Las Vegas flights
Dulles Intl to Miami flights
Baltimore to Dallas/Fort Worth flights
Reagan-National to Los Angeles flights
Baltimore to O'Hare Intl flights
Baltimore to Seattle flights
Dulles Intl to Dallas/Fort Worth flights
Baltimore to Miami flights
Reagan-National to Miami flights
Dulles Intl to Seattle flights
Baltimore to Boston flights
Dulles Intl to Los Angeles flights
Baltimore to Orlando flights
Reagan-National to Las Vegas flights
Dulles Intl to Atlanta flights
Reagan-National to San Francisco flights
Dulles Intl to San Francisco flights
Dulles Intl to Fort Lauderdale flights
Baltimore to Denver flights
Dulles Intl to Orlando flights
Reagan-National to Orlando flights
Dulles Intl to Boston flights
Baltimore to Los Angeles flights
Reagan-National to Fort Lauderdale flights
Reagan-National to Boston flights
Baltimore to Atlanta flights
Dulles Intl to Minneapolis flights
Dulles Intl to Midway flights
Dulles Intl to Hobby flights
Reagan-National to Minneapolis flights
Baltimore to Hobby flights
Reagan-National to Atlanta flights
Baltimore to Midway flights
Reagan-National to Hobby flights
Dulles Intl to Denver flights
Reagan-National to Dallas/Fort Worth flights
Reagan-National to Denver flights
Baltimore to San Francisco flights
Dulles Intl to Honolulu flights
Dulles Intl to Tampa flights
Dulles Intl to Austin flights
Dulles Intl to George Bush Intcntl flights
Baltimore to Minneapolis flights
Dulles Intl to New Orleans flights
Reagan-National to Midway 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 julio 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$99Average$213FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$157Average$393FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$173Average$298FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$187Average$361FlexibilityNo cancel feeOn-time69%

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