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

Frontier, JetBlue, and American Airlines are the most popular carriers operating from Washington, D.C. Reagan-National to Illinois

What airlines fly to Illinois?

American Airlines, United 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. American Airlines is the first choice among our users, with 46% 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 December 2025, there are 5 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.

$63 Cheap Flights from Washington, D.C. Reagan-National Airport to Illinois in 2025/26

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

As of December 2025, 43 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 3:00PM, with 45% of daily flights taking off in the afternoon.

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

307 flights are operational weekly from Washington, D.C. Reagan-National Airport to Illinois as of December 2025. The most popular departure day for this route is Mon, with 20% of flights per week taking off on this day.

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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.

2:00 pm - 6:31 pm

DCA

ORD

29h 31m1 stop

7:41 pm - 1:02 pm

ORD

DCA

16h 21m1 stop

$167Frontier

Wed, Jan 21 - Thu, Jan 29

2:00 pm - 6:31 pm

DCA

ORD

29h 31m1 stop

7:45 am - 2:29 pm

ORD

DCA

5h 44m1 stop

$168Multiple Airlines

Wed, Jan 21 - Sat, Jan 24

1:00 pm - 5:43 pm

DCA

ORD

5h 43m1 stop

7:45 am - 2:29 pm

ORD

DCA

5h 44m1 stop

$172JetBlue

Thu, Jan 15 - Sun, Jan 18

11:55 am - 5:43 pm

DCA

ORD

6h 48m1 stop

7:45 am - 4:19 pm

ORD

DCA

7h 34m1 stop

$176JetBlue

Thu, Jan 15 - Sun, Jan 18

8:45 pm - 9:55 pm

DCA

MDW

2h 10mnonstop

3:30 pm - 6:15 pm

MDW

DCA

1h 45mnonstop

$223Southwest

Thu, Dec 25 - Thu, Jan 1

3:25 pm - 4:40 pm

DCA

MDW

2h 15mnonstop

12:10 pm - 2:55 pm

MDW

DCA

1h 45mnonstop

$227Southwest

Tue, Jan 13 - Tue, Jan 20

12:44 pm - 4:32 pm

DCA

PIA

4h 48m1 stop

5:16 pm - 11:59 pm

PIA

DCA

5h 43m1 stop

$269American Airlines

Fri, Jan 16 - Mon, Jan 19

1:00 pm - 4:54 pm

DCA

MLI

4h 54m1 stop

10:47 am - 7:13 pm

MLI

DCA

7h 26m1 stop

$269United Airlines

Thu, Jan 22 - Mon, Jan 26

7:40 am - 9:24 am

DCA

STL

2h 44mnonstop

6:00 am - 9:03 am

STL

DCA

2h 03mnonstop

$272American Airlines

Fri, Jan 16 - Sun, Jan 18

7:30 am - 12:38 pm

DCA

PIA

6h 08m1 stop

3:00 pm - 8:59 pm

PIA

DCA

4h 59m1 stop

$339United Airlines

Fri, Jan 23 - Mon, Jan 26

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

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

JetBlue

Jan 15

DCA11:55 amWashington, D.C. Reagan-National

6h 48m

1 stop

ORD5:43 pmChicago O'Hare Intl

Jan 18

ORD7:45 amChicago O'Hare Intl

5h 44m

1 stop

DCA2:29 pmWashington, D.C. Reagan-National

$172

Find similar

JetBlue

Jan 15

DCA11:55 amWashington, D.C. Reagan-National

6h 48m

1 stop

ORD5:43 pmChicago O'Hare Intl

Jan 18

ORD7:45 amChicago O'Hare Intl

7h 34m

1 stop

DCA4:19 pmWashington, D.C. Reagan-National

$176

Find similar

JetBlue

Jan 15

DCA1:00 pmWashington, D.C. Reagan-National

5h 43m

1 stop

ORD5:43 pmChicago O'Hare Intl

Jan 18

ORD7:45 amChicago O'Hare Intl

5h 44m

1 stop

DCA2:29 pmWashington, D.C. Reagan-National

$177

Find similar

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

Jan 27

DCA1:44 pmWashington, D.C. Reagan-National

2h 33m

ORD3:17 pmChicago O'Hare Intl

Feb 3

ORD12:58 pmChicago O'Hare Intl

2h 01m

DCA3:59 pmWashington, D.C. Reagan-National

$232

Find similar

American Airlines

Dec 31

DCA9:36 amWashington, D.C. Reagan-National

2h 14m

ORD10:50 amChicago O'Hare Intl

Jan 7

ORD3:30 pmChicago O'Hare Intl

3h 35m

1 stop

DCA8:05 pmWashington, D.C. Reagan-National

$237

Find similar

American Airlines

Feb 14

DCA1:44 pmWashington, D.C. Reagan-National

2h 33m

ORD3:17 pmChicago O'Hare Intl

Feb 16

ORD9:43 amChicago O'Hare Intl

2h 01m

DCA12:44 pmWashington, D.C. Reagan-National

$246

Find similar

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

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 1/21

2:00 pm-6:31 pm

1 stop29h 31m

Chicago O'Hare Intl

Thu 1/29

7:41 pm-1:02 pm

1 stop16h 21m

$167

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 1/21

2:00 pm-6:31 pm

1 stop29h 31m

Chicago O'Hare Intl

Sat 1/24

7:45 am-2:29 pm

1 stop5h 44m

$168

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 1/15

1:00 pm-5:43 pm

1 stop5h 43m

Chicago O'Hare Intl

Sun 1/18

7:45 am-2:29 pm

1 stop5h 44m

$172

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 1/15

11:55 am-5:43 pm

1 stop6h 48m

Chicago O'Hare Intl

Sun 1/18

7:45 am-4:19 pm

1 stop7h 34m

$176

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Thu 12/25

8:45 pm-9:55 pm

Nonstop2h 10m

Chicago Midway

Thu 1/1

3:30 pm-6:15 pm

Nonstop1h 45m

$223

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Tue 1/13

3:25 pm-4:40 pm

Nonstop2h 15m

Chicago Midway

Tue 1/20

12:10 pm-2:55 pm

Nonstop1h 45m

$227

Washington, D.C.Peoria

DCA - PIA

DCAPIA

Washington, D.C. Reagan-National

Fri 1/16

12:44 pm-4:32 pm

1 stop4h 48m

Greater Peoria

Mon 1/19

5:16 pm-11:59 pm

1 stop5h 43m

$269

Washington, D.C.Moline

DCA - MLI

DCAMLI

Washington, D.C. Reagan-National

Thu 1/22

1:00 pm-4:54 pm

1 stop4h 54m

Moline Quad-City

Mon 1/26

10:47 am-7:13 pm

1 stop7h 26m

$269

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Fri 1/16

7:40 am-9:24 am

Nonstop2h 44m

Lambert-St Louis

Sun 1/18

6:00 am-9:03 am

Nonstop2h 03m

$272

Washington, D.C.Peoria

DCA - PIA

DCAPIA

Washington, D.C. Reagan-National

Fri 1/23

7:30 am-12:38 pm

1 stop6h 08m

Greater Peoria

Mon 1/26

3:00 pm-8:59 pm

1 stop4h 59m

$339

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 $267, 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 May is also cheap. Prices for this month can be found on momondo for an average of $273.

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 Wednesday when prices can be found for as low as $376. Flights from Washington, D.C. Reagan-National Airport to Illinois on a Sunday will generally be more expensive and average around $489. 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 $341. Flights at noon are often more expensive with an average ticket price of $433.

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 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 $312 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 $247 on momondo.

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

There are 4 cabin classes available to choose from on Washington, D.C. Reagan-National 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?

No. A direct flight is the cheapest option for a flight between Washington, D.C. Reagan-National Airport to Illinois.

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	$177
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 $177. The best round-trip flight deal from Washington, D.C. Reagan-National Airport to Illinois found on momondo in the last 72 hours is $317.

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), Lambert-St Louis (STL).

Search flight deals

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 December 2025, there are 5 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 737-800 (13.33% of total bookings). The next most popular plane models are Airbus A319 (13.23%), Airbus A320-100/200 (9.19%), and Boeing 737 MAX 8 (8.04%).

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 $98	Free Cancellation	Rating 5.8 3,080 reviews	Search Frontier flights
American Airlines	PriceFrom $154	Free Cancellation	Rating 7.2 11,051 reviews	Search American Airlines flights
Southwest	PriceFrom $178	Free Cancellation	Rating 7.9 4,249 reviews	Search Southwest flights
United Airlines	PriceFrom $189	Free Cancellation	Rating 7.4 9,092 reviews	Search United Airlines 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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Popular cities in Illinois

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

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Flights from Washington, D.C. Reagan-National to New York LaGuardia

Flights from Washington, D.C. Reagan-National to Boston Logan Intl

Flights from Washington, D.C. Reagan-National to Fort Lauderdale

Flights from Washington, D.C. Reagan-National to Palm Beach Intl

Cheap flights from Washington, D.C. Reagan-National Airport to Illinois from $63

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

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

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

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

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.

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?

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 $341. Flights at noon are often more expensive with an average ticket price of $433.

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 to Illinois?

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

There are 4 cabin classes available to choose from on Washington, D.C. Reagan-National 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?

No. A direct flight is the cheapest option for a flight between Washington, D.C. Reagan-National Airport to Illinois.

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

Frontier, JetBlue, and American Airlines are the most popular carriers operating 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?

As of December 2025, 43 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 3:00PM, with 45% of daily flights taking off in the afternoon.

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

307 flights are operational weekly from Washington, D.C. Reagan-National Airport to Illinois as of December 2025. The most popular departure day for this route is Mon, with 20% of flights per week taking off on this day.

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

Fastest flight time

Direct flights

Airports in Illinois

When did momondo last update prices for flights from Washington, D.C. Reagan-National Airport to Illinois?

How many operators does momondo search 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?

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

What is the most popular plane model from Washington, D.C. Reagan-National Airport to Illinois?

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

Why use momondo?

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

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

How can momondo help me find flights 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?

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo