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$76+ 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 4/18. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — ORD
avr. 23 — avr. 301
jeu. 4/23
jeu. 4/30
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 mars 24, 2026.

This Super.com deal was found by Cheapflights users on 3/22. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 5/86:00 pm
DCA
-
ORD
1 stop27h 37m
Frontier
lun. 5/119:42 pm
ORD
-
DCA
1 stop23h 16m
Frontier
Deal found 3/22$212
This Mytrip deal was found by Cheapflights users on 3/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 4/91:00 pm
DCA
-
ORD
1 stop25h 19m
Frontier
jeu. 4/1610:55 am
ORD
-
DCA
1 stop10h 04m
Frontier
Deal found 3/22$215
This Southwest deal was found by Cheapflights users on 3/20. 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. 4/219:55 am
DCA
-
MDW
Nonstop2h 00m
Southwest
mer. 4/221:55 pm
MDW
-
DCA
1 stop3h 45m
Southwest
Deal found 3/20$215
This Super.com deal was found by Cheapflights users on 3/22. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/127:00 am
DCA
-
ORD
1 stop14h 37m
Frontier
jeu. 5/219:42 pm
ORD
-
DCA
1 stop18h 17m
Frontier
Deal found 3/22$216
This Southwest deal was found by Cheapflights users on 3/23. 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.
sam. 5/912:15 pm
DCA
-
MDW
1 stop3h 30m
Southwest
mar. 5/121:55 pm
MDW
-
DCA
1 stop3h 45m
Southwest
Deal found 3/23$216
This Southwest deal was found by Cheapflights users on 3/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/1411:45 am
DCA
-
MDW
Nonstop2h 00m
Southwest
sam. 4/187:45 am
MDW
-
DCA
2 stops9h 40m
Southwest
Deal found 3/24$219
This Southwest deal was found by Cheapflights users on 3/23. 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.
jeu. 5/285:15 pm
DCA
-
MDW
1 stop4h 45m
Southwest
mar. 6/21:55 pm
MDW
-
DCA
1 stop3h 45m
Southwest
Deal found 3/23$220
This American Airlines deal was found by Cheapflights users on 3/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 6/311:35 am
DCA
-
ORD
Nonstop2h 20m
American Airlines
lun. 6/88:57 pm
ORD
-
DCA
Nonstop2h 02m
American Airlines
Deal found 3/23$221
This Southwest deal was found by Cheapflights users on 3/23. 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.
mer. 4/229:05 am
DCA
-
MDW
2 stops7h 40m
Southwest
sam. 4/256:35 pm
MDW
-
DCA
Nonstop1h 55m
Southwest
Deal found 3/23$221
This Frontier deal was found by Cheapflights users on 3/21. 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.
sam. 5/161:59 pm
DCA
-
ORD
1 stop7h 38m
Frontier
mer. 5/209:42 pm
ORD
-
DCA
1 stop14h 17m
Frontier
Deal found 3/21$222
This United Airlines deal was found by Cheapflights users on 3/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 4/236:30 am
DCA
-
ORD
Nonstop2h 16m
United Airlines
jeu. 4/304:00 pm
ORD
-
DCA
Nonstop2h 05m
United Airlines
Deal found 3/24$223
This Southwest deal was found by Cheapflights users on 3/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 5/289:35 pm
DCA
-
MDW
Nonstop2h 00m
Southwest
lun. 6/18:05 pm
MDW
-
DCA
Nonstop1h 50m
Southwest
Deal found 3/24$223

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 mars 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$212
(Super.com)

One-way from

$76
(Frontier)

Popular in

March

Cheapest in

September

Average price

$309

Good round-trip deal

$305 or less

Good one-way deal

$198 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. 8% potential increase in price ($23 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 March 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 mars 24, 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

lun. 4/27

5:45 pm-10:15 pm

1 stop5h 30m

Chicago O'Hare Intl

mer. 4/29

1:36 pm-6:59 pm

1 stop4h 23m

$224

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

sam. 5/9

6:10 am-2:35 pm

2 stops9h 25m

Chicago Midway

mar. 5/12

1:55 pm-6:40 pm

1 stop3h 45m

$225

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

sam. 5/30

6:40 am-7:45 am

Nonstop2h 05m

Chicago Midway

lun. 6/1

5:40 pm-10:40 pm

1 stop4h 00m

$235

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

sam. 5/9

1:00 pm-2:20 pm

Nonstop2h 20m

Chicago O'Hare Intl

lun. 5/11

7:45 pm-10:47 pm

Nonstop2h 02m

$239

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

jeu. 4/9

9:35 pm-10:35 pm

Nonstop2h 00m

Chicago Midway

lun. 4/13

5:00 pm-7:55 pm

Nonstop1h 55m

$239

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

mar. 4/14

1:40 pm-6:35 pm

1 stop5h 55m

Chicago O'Hare Intl

lun. 4/20

5:53 pm-11:41 pm

1 stop4h 48m

$244
Quickest round-trip

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

ven. 5/15

9:35 pm-10:35 pm

Nonstop2h 00m

Chicago Midway

mar. 5/19

11:30 am-2:20 pm

Nonstop1h 50m

$248

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

lun. 4/13

6:05 am-12:50 pm

1 stop7h 45m

Chicago O'Hare Intl

mar. 4/14

11:55 am-8:45 pm

2 stops7h 50m

$249

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

jeu. 4/23

7:25 am-12:20 pm

1 stop5h 55m

Chicago Midway

sam. 4/25

9:15 am-8:55 pm

2 stops10h 40m

$250

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

jeu. 5/14

9:35 pm-10:35 pm

Nonstop2h 00m

Chicago Midway

ven. 5/15

5:00 pm-7:55 pm

Nonstop1h 55m

$253

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

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, 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 mars 24, 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 10% 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 March 14, 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. Sunday at noon 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 mars 24, 2026.

The most flights from DCA to USIL are scheduled on a Monday (51 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (10 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 mars 24, 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
4,331 reviews

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

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
4,331 reviews
Southwest
8.0
Very good
4,331 reviews

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

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
9,470 reviews
Southwest
8.0
Very good
4,331 reviews

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

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
11,491 reviews
Southwest
8.0
Very good
4,331 reviews

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

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
5.7
Fair
3,018 reviews
Southwest
8.0
Very good
4,331 reviews

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

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 $239, Delta can have you in Illinois from Washington, D.C. Reagan-National Airport in 2h 20m. 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 $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 Qatar Airways (79%), ANA (76%) or Air New Zealand (72%) 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 $122. While the most popular route (Washington, D.C. Reagan-National - Chicago O'Hare Intl) can be booked for $185 on average, our data indicates $901 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.
Dulles Intl to Dallas/Fort Worth flights
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Baltimore to Tampa flights
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Baltimore to Seattle flights
Dulles Intl to George Bush Intcntl flights
Dulles Intl to Boston flights
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Baltimore to Boston flights
Reagan-National to Boston flights
Reagan-National to Nashville flights
Dulles Intl to Nashville flights
Reagan-National to George Bush Intcntl flights
Baltimore to San Francisco flights
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Dulles Intl to Austin flights
Reagan-National to Tampa 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 mars 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$29Average$130FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$154Average$425FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$187Average$309FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$189Average$346FlexibilityNo cancel feeOn-time69%

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