What is the cheapest airline that flies from Washington, D.C. Reagan-National to Illinois?

Southwest, Delta, and United Airlines are the most popular carriers operating from Washington, D.C. Reagan-National to Illinois

What airlines fly to Illinois?

United Airlines, American Airlines and Southwest are the top three most popular airlines that fly to Illinois from Washington, D.C. Reagan-National Airport according to our data. United Airlines is the first choice among our users, with 50% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 4 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

How many operators does momondo search for flights from Washington, D.C. Reagan-National Airport to Illinois?

As of October 2026, there are 4 operators available to choose from for flights from Washington, D.C. Reagan-National Airport to Illinois.

How old do you have to be to fly from Washington, D.C. Reagan-National Airport to Illinois?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Reagan-National Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$114 Cheap Flights from Washington, D.C. Reagan-National Airport to Illinois in 2026/27

Q: How many flights depart from Washington, D.C. Reagan-National Airport to Illinois on average per day?

As of October 2026, 46 flights take off from Washington, D.C. Reagan-National Airport and land in Illinois each day. The most common flight departure time for this route is 7:00AM, with 40% of daily flights taking off at noon.

Q: How many flights depart from Washington, D.C. Reagan-National Airport to Illinois on average per week?

326 flights are operational weekly from Washington, D.C. Reagan-National Airport to Illinois as of October 2026. The most popular departure day for this route is Sun, with 19% of flights per week taking off on this day.

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Washington, D.C. Reagan-National Airport to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:52 am - 3:42 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

4h 50m1 stop Charlotte Douglas

8:50 am - 11:52 amORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 02mnonstop

$213American Airlines

Thu, Feb 4 - Mon, Feb 8

11:52 am - 3:42 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

4h 50m1 stop Charlotte Douglas

7:26 pm - 10:29 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 03mnonstop

$213American Airlines

Thu, Jan 21 - Mon, Jan 25

6:00 am - 10:28 amDCA Washington, D.C. Reagan-National-MDW Chicago Midway

5h 28m1 stop Atlanta Hartsfield-Jackson

6:41 pm - 11:34 pmMDW Chicago Midway-DCA Washington, D.C. Reagan-National

3h 53m1 stop Detroit Metropolitan Wayne County

$213Delta

Sun, Dec 6 - Sun, Dec 13

8:00 am - 12:40 pmDCA Washington, D.C. Reagan-National-MDW Chicago Midway

5h 40m1 stop Kansas City

8:25 am - 11:25 amMDW Chicago Midway-DCA Washington, D.C. Reagan-National

2h 00mnonstop

$214Southwest

Mon, Jan 11 - Thu, Jan 14

7:40 pm - 12:20 amDCA Washington, D.C. Reagan-National-MDW Chicago Midway

5h 40m1 stop Nashville Intl

9:15 am - 12:00 pmMDW Chicago Midway-DCA Washington, D.C. Reagan-National

1h 45mnonstop

$217Southwest

Mon, Nov 30 - Wed, Dec 2

7:00 am - 12:21 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

18h 21m1 stop Denver Intl

8:59 am - 9:50 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

11h 51m2 stops Dallas/Fort Worth Denver Intl

$217Frontier

Wed, Nov 11 - Wed, Nov 18

1:54 pm - 12:53 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

11h 59m1 stop Denver Intl

7:00 am - 9:55 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

13h 55m1 stop Denver Intl

$218Frontier

Wed, Nov 25 - Wed, Dec 2

7:00 am - 12:54 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

18h 54m1 stop Denver Intl

7:00 am - 10:27 amORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

26h 27m1 stop Fort Lauderdale

$218Multiple Airlines

Fri, Dec 11 - Mon, Dec 14

7:40 am - 9:00 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 20mnonstop

7:00 am - 9:56 amORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

1h 56mnonstop

$219United Airlines

Mon, Nov 9 - Tue, Nov 10

6:05 pm - 7:29 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 24mnonstop

7:00 am - 9:58 amORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

1h 58mnonstop

$221United Airlines

Mon, Feb 22 - Fri, Feb 26

Cheap last minute flights

Enter your travel dates to find the best prices.

6:00 pm - 12:21 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

7h 21m1 stop Denver Intl

6:30 am - 4:47 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

9h 17m1 stop Denver Intl

$258Frontier

Sat, Oct 31 - Tue, Nov 3

1:00 pm - 12:21 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

12h 21m1 stop Denver Intl

6:30 am - 4:47 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

9h 17m1 stop Denver Intl

$262Frontier

Sat, Oct 31 - Thu, Nov 19

7:40 am - 9:00 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 20mnonstop

8:00 am - 11:08 amORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 08mnonstop

$344United Airlines

Sat, Oct 31 - Thu, Nov 19

1:00 pm - 2:00 pmDCA Washington, D.C. Reagan-National-MDW Chicago Midway

2h 00mnonstop

12:25 pm - 3:15 pmMDW Chicago Midway-DCA Washington, D.C. Reagan-National

1h 50mnonstop

$355Southwest

Tue, Oct 27 - Fri, Nov 27

8:33 am - 12:22 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

4h 49m1 stop Charlotte Douglas

6:56 am - 10:00 amORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 04mnonstop

$361American Airlines

Sat, Oct 31 - Thu, Nov 19

7:25 am - 12:25 pmDCA Washington, D.C. Reagan-National-MDW Chicago Midway

6h 00m1 stop Atlanta Hartsfield-Jackson

11:00 am - 1:50 pmMDW Chicago Midway-DCA Washington, D.C. Reagan-National

1h 50mnonstop

$365Southwest

Tue, Oct 27 - Fri, Nov 27

10:13 am - 4:32 pmDCA Washington, D.C. Reagan-National-MLI Moline Quad-City

7h 19m1 stop Chicago O'Hare Intl

6:00 am - 1:59 pmMLI Moline Quad-City-DCA Washington, D.C. Reagan-National

6h 59m1 stop Chicago O'Hare Intl

$377American Airlines

Sat, Oct 31 - Wed, Nov 4

6:00 pm - 12:21 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

7h 21m1 stop Denver Intl

7:00 am - 11:24 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

15h 24m1 stop Fort Lauderdale

$398Multiple Airlines

Sat, Oct 31 - Sun, Nov 1

6:00 pm - 12:21 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

7h 21m1 stop Denver Intl

7:00 am - 9:59 amORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

25h 59m1 stop Fort Lauderdale

$408Multiple Airlines

Sat, Oct 31 - Mon, Nov 2

5:10 pm - 6:29 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 19mnonstop

7:45 pm - 10:43 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

1h 58mnonstop

$476United Airlines

Fri, Oct 30 - Fri, Oct 30

Cheap direct flights

Enter your travel dates to find the best prices.

7:40 am - 9:00 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 20mnonstop

7:00 am - 9:56 amORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

1h 56mnonstop

$219United Airlines

Mon, Nov 9 - Tue, Nov 10

6:05 pm - 7:29 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 24mnonstop

7:00 am - 9:58 amORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

1h 58mnonstop

$221United Airlines

Mon, Feb 22 - Fri, Feb 26

10:20 am - 11:34 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 14mnonstop

12:55 pm - 3:59 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 04mnonstop

$223American Airlines

Thu, Dec 3 - Fri, Dec 4

6:08 am - 7:30 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 22mnonstop

8:52 pm - 11:59 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 07mnonstop

$223American Airlines

Tue, Dec 15 - Fri, Dec 18

8:45 am - 10:05 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 20mnonstop

5:55 am - 8:51 amORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

1h 56mnonstop

$223United Airlines

Tue, Dec 1 - Thu, Dec 3

7:40 am - 9:08 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 28mnonstop

5:00 pm - 8:17 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 17mnonstop

$223United Airlines

Sat, Nov 21 - Sat, Nov 21

5:06 pm - 6:30 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 24mnonstop

8:53 am - 11:54 amORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 01mnonstop

$223American Airlines

Wed, Dec 2 - Fri, Dec 4

3:35 pm - 4:50 pmDCA Washington, D.C. Reagan-National-MDW Chicago Midway

2h 15mnonstop

7:20 am - 10:10 amMDW Chicago Midway-DCA Washington, D.C. Reagan-National

1h 50mnonstop

$241Southwest

Mon, Nov 16 - Fri, Nov 20

1:00 pm - 2:15 pmDCA Washington, D.C. Reagan-National-MDW Chicago Midway

2h 15mnonstop

7:20 am - 10:10 amMDW Chicago Midway-DCA Washington, D.C. Reagan-National

1h 50mnonstop

$242Southwest

Wed, Nov 18 - Fri, Nov 20

9:15 pm - 10:20 pmDCA Washington, D.C. Reagan-National-MDW Chicago Midway

2h 05mnonstop

12:25 pm - 3:15 pmMDW Chicago Midway-DCA Washington, D.C. Reagan-National

1h 50mnonstop

$242Southwest

Fri, Nov 20 - Fri, Nov 27

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American Airlines flights from Washington, D.C. Reagan-National Airport to Illinois

Our best American Airlines deals on Washington, D.C. Reagan-National Airport to Illinois flight tickets

American Airlines

Nov 19

DCA5:00 amWashington, D.C. Reagan-National

4h 59m

1 stop

ORD8:59 amChicago O'Hare Intl

Nov 21

ORD8:54 pmChicago O'Hare Intl

2h 05m

DCA11:59 pmWashington, D.C. Reagan-National

$213

American Airlines

Nov 19

DCA5:00 amWashington, D.C. Reagan-National

4h 59m

1 stop

ORD8:59 amChicago O'Hare Intl

Nov 22

ORD8:45 amChicago O'Hare Intl

2h 04m

DCA11:49 amWashington, D.C. Reagan-National

$222

American Airlines

Nov 21

DCA11:56 amWashington, D.C. Reagan-National

5h 20m

1 stop

ORD4:16 pmChicago O'Hare Intl

Dec 2

ORD10:53 amChicago O'Hare Intl

2h 06m

DCA1:59 pmWashington, D.C. Reagan-National

$231

Frontier flights from Washington, D.C. Reagan-National Airport to Illinois

Our best Frontier deals on Washington, D.C. Reagan-National Airport to Illinois flight tickets

Frontier

Nov 3

DCA7:00 amWashington, D.C. Reagan-National

18h 21m

1 stop

ORD12:21 amChicago O'Hare Intl

Nov 10

ORD6:30 amChicago O'Hare Intl

14h 20m

1 stop

DCA9:50 pmWashington, D.C. Reagan-National

$216

Frontier

Nov 11

DCA7:00 amWashington, D.C. Reagan-National

18h 21m

1 stop

ORD12:21 amChicago O'Hare Intl

Nov 18

ORD8:59 amChicago O'Hare Intl

11h 51m

2 stops

DCA9:50 pmWashington, D.C. Reagan-National

$217

Frontier

Nov 14

DCA6:00 pmWashington, D.C. Reagan-National

7h 21m

1 stop

ORD12:21 amChicago O'Hare Intl

Nov 16

ORD6:30 amChicago O'Hare Intl

9h 17m

1 stop

DCA4:47 pmWashington, D.C. Reagan-National

$218

momondo Fare Finder

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 Washington, D.C. Reagan-National - ORD Chicago O'Hare Intl

DCAORD

Washington, D.C. Reagan-National

Thu 2/4

11:52 am-3:42 pm

1 stop4h 50m

Chicago O'Hare Intl

Mon 2/8

8:50 am-11:52 am

Nonstop2h 02m

$213

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - ORD Chicago O'Hare Intl

DCAORD

Washington, D.C. Reagan-National

Thu 1/21

11:52 am-3:42 pm

1 stop4h 50m

Chicago O'Hare Intl

Mon 1/25

7:26 pm-10:29 pm

Nonstop2h 03m

$213

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - MDW Chicago Midway

DCAMDW

Washington, D.C. Reagan-National

Sun 12/6

6:00 am-10:28 am

1 stop5h 28m

Chicago Midway

Sun 12/13

6:41 pm-11:34 pm

1 stop3h 53m

$213

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - MDW Chicago Midway

DCAMDW

Washington, D.C. Reagan-National

Mon 1/11

8:00 am-12:40 pm

1 stop5h 40m

Chicago Midway

Thu 1/14

8:25 am-11:25 am

Nonstop2h 00m

$214

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - MDW Chicago Midway

DCAMDW

Washington, D.C. Reagan-National

Mon 11/30

7:40 pm-12:20 am

1 stop5h 40m

Chicago Midway

Wed 12/2

9:15 am-12:00 pm

Nonstop1h 45m

$217

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - ORD Chicago O'Hare Intl

DCAORD

Washington, D.C. Reagan-National

Wed 11/11

7:00 am-12:21 am

1 stop18h 21m

Chicago O'Hare Intl

Wed 11/18

8:59 am-9:50 pm

2 stops11h 51m

$217

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - ORD Chicago O'Hare Intl

DCAORD

Washington, D.C. Reagan-National

Wed 11/25

1:54 pm-12:53 am

1 stop11h 59m

Chicago O'Hare Intl

Wed 12/2

7:00 am-9:55 pm

1 stop13h 55m

$218

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - ORD Chicago O'Hare Intl

DCAORD

Washington, D.C. Reagan-National

Fri 12/11

7:00 am-12:54 am

1 stop18h 54m

Chicago O'Hare Intl

Mon 12/14

7:00 am-10:27 am

1 stop26h 27m

$218

Quickest round-trip

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - ORD Chicago O'Hare Intl

DCAORD

Washington, D.C. Reagan-National

Mon 11/9

7:40 am-9:00 am

Nonstop2h 20m

Chicago O'Hare Intl

Tue 11/10

7:00 am-9:56 am

Nonstop1h 56m

$219

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - ORD Chicago O'Hare Intl

DCAORD

Washington, D.C. Reagan-National

Mon 2/22

6:05 pm-7:29 pm

Nonstop2h 24m

Chicago O'Hare Intl

Fri 2/26

7:00 am-9:58 am

Nonstop1h 58m

$221

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Washington, D.C. Reagan-National Airport to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Washington, D.C. Reagan-National Airport is in February. Flight prices, which tend to average around $322, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of February, then flying in December is also cheap. Prices for this month can be found on momondo for an average of $340.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Washington, D.C. Reagan-National Airport to Illinois is on a Saturday when prices can be found for as low as $404. Flights from Washington, D.C. Reagan-National Airport to Illinois on a Monday will generally be more expensive and average around $520. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Washington, D.C. Reagan-National Airport to Illinois during this time can be as low as $427. Flights in the afternoon are often more expensive with an average ticket price of $446.

What is the cheapest Washington, D.C. Reagan-National to Illinois flight route?

Fly from Washington, D.C. Reagan-National to Chicago Midway for the best Washington, D.C. Reagan-National - Illinois flight prices

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

You are more likely to see cheaper flights to Illinois from Washington, D.C. Reagan-National Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $373 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Washington, D.C. Reagan-National Airport for as low as $275 on momondo.

What cabin class options are available on Washington, D.C. Reagan-National Airport to Illinois flights?

There are 4 cabin classes available to choose from on Washington, D.C. Reagan-National Airport to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Washington, D.C. Reagan-National Airport to Illinois flights?

You could potentially save up to 11% on your flight if you consider stops on a Washington, D.C. Reagan-National Airport to Illinois flight.

Cheap Washington, D.C. Reagan-National Airport to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Reagan-National Airport to Illinois

Best Price Found	$114
Fastest flight time	2h 00m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from Washington, D.C. Reagan-National Airport in the past 72 hours is $114. The best round-trip flight deal from Washington, D.C. Reagan-National Airport to Illinois found on momondo in the last 72 hours is $213.

The fastest flight from Washington, D.C. Reagan-National Airport to Illinois takes 2h 00m

Direct flights go from Washington, D.C. Reagan-National Airport to Illinois every day.

There are 98 airports in Illinois. From Washington, D.C. Reagan-National Airport there are direct flights to Chicago O'Hare Intl (ORD), Chicago Midway (MDW).

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Frequently asked questions about flying from Washington, D.C. Reagan-National Airport to Illinois

When did momondo last update prices for flights from Washington, D.C. Reagan-National Airport to Illinois?
Prices for flights from Washington, D.C. Reagan-National Airport to Illinois refresh daily.
How many operators does momondo search for flights from Washington, D.C. Reagan-National Airport to Illinois?
As of October 2026, there are 4 operators available to choose from for flights from Washington, D.C. Reagan-National Airport to Illinois.
How old do you have to be to fly from Washington, D.C. Reagan-National Airport to Illinois?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Reagan-National Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Washington, D.C. Reagan-National Airport to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Washington, D.C. Reagan-National Airport to Illinois is Boeing 737 MAX 8 (14.73% of total bookings). The next most popular plane models are Boeing 737-800 (12.47%), Airbus A319 (12.07%), and Airbus A320-100/200 (11.86%).

Best airlines flying from Washington, D.C. Reagan-National Airport to Illinois

Compare and see reviews for airlines that fly from Washington, D.C. Reagan-National Airport to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $29	Free Cancellation	Rating 5.5 2,519 reviews	Search Frontier flights
American Airlines	PriceFrom $204	Free Cancellation	Rating 7.0 12,193 reviews	Search American Airlines flights
United Airlines	PriceFrom $233	Free Cancellation	Rating 7.3 10,437 reviews	Search United Airlines flights
Southwest	PriceFrom $236	Free Cancellation	Rating 7.9 4,223 reviews	Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Illinois?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Illinois from Washington, D.C..

Can I find flights from Washington, D.C. to Illinois with flexible booking policies on momondo?

Flights from Washington, D.C. to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Washington, D.C. to Illinois?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington, D.C. to Illinois.

I’m not ready to book a flight from Washington, D.C. to Illinois right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Illinois from Washington, D.C.. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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Cheap flights from Washington, D.C. Reagan-National Airport to Illinois from $114

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American Airlines flights from Washington, D.C. Reagan-National Airport to Illinois

Our best American Airlines deals on Washington, D.C. Reagan-National Airport to Illinois flight tickets

Frontier flights from Washington, D.C. Reagan-National Airport to Illinois

Our best Frontier deals on Washington, D.C. Reagan-National Airport to Illinois flight tickets

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Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Illinois that are best for you.

See travel insights to Illinois from

How to get the cheapest flight ticket from Washington, D.C. Reagan-National Airport to Illinois

What is the cheapest month to fly to Illinois?

What is the cheapest day to depart on your flight to Illinois?

What is the cheapest time of day to depart on your flight to Illinois?

What is the cheapest Washington, D.C. Reagan-National to Illinois flight route?

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

What cabin class options are available on Washington, D.C. Reagan-National Airport to Illinois flights?

Can stopping save me money on Washington, D.C. Reagan-National Airport to Illinois flights?

What is the cheapest airline that flies from Washington, D.C. Reagan-National to Illinois?

What airlines fly to Illinois?

How many flights depart from Washington, D.C. Reagan-National Airport to Illinois on average per day?

How many flights depart from Washington, D.C. Reagan-National Airport to Illinois on average per week?

Cheap Washington, D.C. Reagan-National Airport to Illinois flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

Frequently asked questions about flying from Washington, D.C. Reagan-National Airport to Illinois

Best airlines flying from Washington, D.C. Reagan-National Airport to Illinois

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Washington, D.C. Reagan-National Airport flight routes

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Illinois flight routes

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