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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 7/7. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — ORD
Jun 10 — Jun 171
Wed 6/10
Wed 6/17
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 May 11, 2026.

This Trip.com deal was found by Cheapflights users on 5/7. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:59 pm
DCA
-
ORD
1 stop7h 33m
Frontier
Mon 6/19:37 pm
ORD
-
DCA
1 stop23h 21m
Frontier
Deal found 5/7$233
This Southwest deal was found by Cheapflights users on 5/7. 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.
Mon 6/12:45 pm
DCA
-
MDW
1 stop4h 05m
Southwest
Wed 6/34:40 pm
MDW
-
DCA
1 stop5h 20m
Southwest
Deal found 5/7$233
This Gotogate deal was found by Cheapflights users on 5/9. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/301:59 pm
DCA
-
ORD
1 stop7h 33m
Frontier
Mon 6/19:37 pm
ORD
-
DCA
1 stop23h 21m
Frontier
Deal found 5/9$236
This Delta deal was found by Cheapflights users on 5/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/17:30 pm
DCA
-
ORD
1 stop5h 29m
Delta
Wed 6/35:30 am
ORD
-
DCA
1 stop4h 30m
Delta
Deal found 5/10$238
This Delta deal was found by Cheapflights users on 5/11. 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.
Sat 6/66:05 am
DCA
-
MDW
1 stop3h 38m
Delta
Tue 6/91:26 pm
MDW
-
DCA
1 stop4h 33m
Delta
Deal found 5/11$238
This United Airlines deal was found by Cheapflights users on 5/7. 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.
Thu 8/2710:30 am
DCA
-
ORD
Nonstop1h 57m
United Airlines
Sat 8/297:45 pm
ORD
-
DCA
Nonstop1h 41m
United Airlines
Deal found 5/7$239
This Southwest deal was found by Cheapflights users on 5/11. 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 6/19:35 pm
DCA
-
MDW
Nonstop2h 00m
Southwest
Thu 6/412:45 pm
MDW
-
DCA
Nonstop1h 50m
Southwest
Deal found 5/11$239
This Expedia deal was found by Cheapflights users on 5/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/301:59 pm
DCA
-
ORD
1 stop7h 33m
Frontier
Tue 6/29:37 pm
ORD
-
DCA
1 stop14h 22m
Frontier
Deal found 5/10$240
This Trip.com deal was found by Cheapflights users on 5/7. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/271:59 pm
DCA
-
ORD
1 stop7h 33m
Frontier
Sun 5/319:37 pm
ORD
-
DCA
1 stop23h 21m
Frontier
Deal found 5/7$241
This American Airlines deal was found by Cheapflights users on 5/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/33:57 pm
DCA
-
ORD
Nonstop2h 32m
American Airlines
Wed 7/85:58 am
ORD
-
DCA
Nonstop2h 17m
American Airlines
Deal found 5/10$243
This Southwest deal was found by Cheapflights users on 5/11. 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 7/36:55 pm
DCA
-
MDW
Nonstop2h 10m
Southwest
Tue 7/78:30 am
MDW
-
DCA
Nonstop1h 45m
Southwest
Deal found 5/11$243
This Trip.com deal was found by Cheapflights users on 5/7. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/271:59 pm
DCA
-
ORD
1 stop7h 33m
Frontier
Thu 5/289:37 pm
ORD
-
DCA
1 stop23h 21m
Frontier
Deal found 5/7$246

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 May 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$233
(Trip.com)

One-way from

$99
(Southwest)

Popular in

March

Cheapest in

September

Average price

$309

Good round-trip deal

$321 or less

Good one-way deal

$195 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. 7% potential increase in price ($21 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Tue 6/23

7:30 pm-11:59 pm

1 stop5h 29m

Chicago O'Hare Intl

Mon 6/29

11:30 am-6:59 pm

1 stop6h 29m

$238

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Mon 6/22

3:30 pm-4:52 pm

Nonstop2h 22m

Chicago O'Hare Intl

Wed 6/24

12:45 pm-3:52 pm

Nonstop2h 07m

$243
Quickest round-trip

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Wed 7/29

9:30 pm-10:30 pm

Nonstop2h 00m

Chicago Midway

Fri 7/31

8:15 am-11:10 am

Nonstop1h 55m

$253

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Wed 8/5

1:00 pm-4:55 pm

1 stop4h 55m

Chicago Midway

Mon 8/10

9:00 pm-11:55 pm

Nonstop1h 55m

$257

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Thu 7/9

9:00 pm-10:00 pm

Nonstop2h 00m

Chicago Midway

Tue 7/14

11:25 am-4:10 pm

1 stop3h 45m

$257

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Sat 7/11

6:35 pm-9:55 pm

1 stop4h 20m

Chicago Midway

Tue 7/14

1:00 pm-3:55 pm

Nonstop1h 55m

$257

Washington, D.C.Moline

DCA - MLI

DCAMLI

Washington, D.C. Reagan-National

Tue 8/11

6:00 am-10:25 am

1 stop5h 25m

Moline Quad-City

Tue 8/18

6:00 am-12:42 pm

1 stop5h 42m

$261

Washington, D.C.Moline

DCA - MLI

DCAMLI

Washington, D.C. Reagan-National

Wed 8/12

6:00 am-10:25 am

1 stop5h 25m

Moline Quad-City

Tue 8/18

5:09 pm-10:44 pm

1 stop4h 35m

$261

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Mon 7/13

12:23 pm-4:23 pm

1 stop5h 00m

Chicago O'Hare Intl

Wed 7/15

11:30 am-4:34 pm

1 stop4h 04m

$267

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 8/5

11:00 am-6:03 pm

1 stop8h 03m

Chicago O'Hare Intl

Mon 8/10

2:25 pm-8:59 pm

1 stop5h 34m

$267

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/10

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

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 73 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 March is currently the most expensive (average of $197). 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 May 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 7% on the flight price compared to flying in the morning, 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 May 9, 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.

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 May 11, 2026.

The most flights from DCA to USIL are scheduled on a Monday (55 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (36 on average).

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

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 May 11, 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
8.0
Very good
4,295 reviews

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,295 reviews
Southwest
8.0
Very good
4,295 reviews

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,701 reviews
Southwest
8.0
Very good
4,295 reviews

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,661 reviews
Southwest
8.0
Very good
4,295 reviews

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.6
Fair
2,952 reviews
Southwest
8.0
Very good
4,295 reviews

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 $253, Delta can have you in Illinois from Washington, D.C. Reagan-National Airport in 2h. 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 $73 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 (88%), Japan Airlines (81%) or United Airlines (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 $119. While the most popular route (Washington, D.C. Reagan-National - Chicago O'Hare Intl) can be booked for $197 on average, our data indicates $764 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 March is currently the most expensive (average of $197). 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 Seattle flights
Dulles Intl to Dallas/Fort Worth flights
Reagan-National to Seattle flights
Baltimore to Dallas/Fort Worth flights
Dulles Intl to Las Vegas flights
Baltimore to Hobby flights
Baltimore to Los Angeles flights
Baltimore to Orlando flights
Baltimore to Atlanta flights
Reagan-National to Miami flights
Baltimore to Miami flights
Reagan-National to Los Angeles flights
Dulles Intl to Orlando flights
Baltimore to Seattle flights
Baltimore to Fort Lauderdale flights
Dulles Intl to Denver flights
Dulles Intl to Miami flights
Reagan-National to O'Hare Intl flights
Reagan-National to Orlando flights
Reagan-National to Las Vegas flights
Dulles Intl to Los Angeles flights
Baltimore to Las Vegas flights
Baltimore to O'Hare Intl flights
Dulles Intl to Fort Lauderdale flights
Dulles Intl to Hobby flights
Baltimore to Boston flights
Dulles Intl to O'Hare Intl flights
Reagan-National to Dallas/Fort Worth flights
Dulles Intl to San Francisco flights
Baltimore to Denver flights
Dulles Intl to Boston flights
Dulles Intl to Atlanta flights
Reagan-National to Boston flights
Baltimore to George Bush Intcntl flights
Baltimore to San Francisco flights
Dulles Intl to Tampa flights
Reagan-National to Hobby flights
Reagan-National to San Francisco flights
Dulles Intl to Midway flights
Dulles Intl to New Orleans flights
Baltimore to Tampa flights
Dulles Intl to San Diego flights
Reagan-National to George Bush Intcntl flights
Dulles Intl to George Bush Intcntl flights
Reagan-National to Fort Lauderdale flights
Reagan-National to Nashville flights
Reagan-National to Atlanta flights
Dulles Intl to Sky Harbor Intl flights
Dulles Intl to Salt Lake City flights
Dulles Intl to Minneapolis 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 May 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$169FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$154Average$412FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$189Average$353FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$191Average$334FlexibilityNo cancel feeOn-time63%

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