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

Delta, Southwest, 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 45% 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 March 2026, 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.

$81 Cheap Flights from Washington, D.C. Reagan-National Airport to Illinois in 2026

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

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

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

As of March 2026, 44 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 43% of daily flights taking off at noon.

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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.

6:00 am - 7:29 am

DCA

ORD

2h 29mnonstop

9:01 pm - 11:57 pm

ORD

DCA

1h 56mnonstop

$186American Airlines

Sat, May 2 - Mon, May 4

6:00 am - 7:29 am

DCA

ORD

2h 29mnonstop

9:01 pm - 11:57 pm

ORD

DCA

1h 56mnonstop

$188American Airlines

Sat, Apr 11 - Mon, Apr 13

12:29 pm - 5:54 pm

DCA

MDW

6h 25m

1 stop

6:34 pm - 10:51 pm

MDW

DCA

3h 17m

1 stop

$188Delta

Wed, Apr 8 - Fri, Apr 10

3:35 pm - 4:45 pm

DCA

MDW

2h 10mnonstop

7:25 pm - 10:15 pm

MDW

DCA

1h 50mnonstop

$191Southwest

Mon, May 4 - Wed, May 6

8:00 am - 9:50 am

DCA

ORD

26h 50m

1 stop

10:50 am - 1:00 pm

ORD

DCA

25h 10m

1 stop

$192Frontier

Thu, Apr 16 - Sun, Apr 19

12:00 pm - 1:22 pm

DCA

ORD

2h 22mnonstop

7:40 pm - 10:52 pm

ORD

DCA

2h 12mnonstop

$197United Airlines

Wed, Mar 25 - Wed, Mar 25

2:45 pm - 5:50 pm

DCA

MDW

4h 05m

1 stop

7:25 pm - 10:15 pm

MDW

DCA

1h 50mnonstop

$197Southwest

Mon, May 4 - Wed, May 6

7:30 am - 8:47 am

DCA

ORD

2h 17mnonstop

6:00 am - 8:56 am

ORD

DCA

1h 56mnonstop

$198United Airlines

Fri, May 15 - Mon, May 18

6:00 am - 9:10 am

DCA

ORD

4h 10m

1 stop

5:40 pm - 10:51 pm

ORD

DCA

4h 11m

1 stop

$199Delta

Tue, Mar 24 - Tue, Apr 7

8:00 am - 9:00 pm

DCA

STL

38h 00m

2 stops

8:17 pm - 1:00 pm

STL

DCA

15h 43m

1 stop

$274Frontier

Wed, Apr 15 - Mon, Apr 27

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

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

Delta

Apr 8

DCA12:29 pmWashington, D.C. Reagan-National

6h 25m

1 stop

MDW5:54 pmChicago Midway

Apr 10

MDW6:34 pmChicago Midway

3h 17m

1 stop

DCA10:51 pmWashington, D.C. Reagan-National

$188

Delta

Mar 24

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

4h 10m

1 stop

ORD9:10 amChicago O'Hare Intl

Apr 7

ORD5:40 pmChicago O'Hare Intl

4h 11m

1 stop

DCA10:51 pmWashington, D.C. Reagan-National

$199

Delta

Mar 24

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

6h 15m

1 stop

ORD11:15 amChicago O'Hare Intl

Apr 1

ORD5:40 pmChicago O'Hare Intl

4h 11m

1 stop

DCA10:51 pmWashington, D.C. Reagan-National

$217

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

May 2

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

2h 29m

ORD7:29 amChicago O'Hare Intl

May 4

ORD9:01 pmChicago O'Hare Intl

1h 56m

DCA11:57 pmWashington, D.C. Reagan-National

$186

American Airlines

Apr 11

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

2h 29m

ORD7:29 amChicago O'Hare Intl

Apr 13

ORD9:01 pmChicago O'Hare Intl

1h 56m

DCA11:57 pmWashington, D.C. Reagan-National

$188

American Airlines

Apr 8

DCA5:55 amWashington, D.C. Reagan-National

2h 29m

ORD7:24 amChicago O'Hare Intl

Apr 9

ORD6:08 amChicago O'Hare Intl

1h 57m

DCA9:05 amWashington, D.C. Reagan-National

$190

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

Sat 5/2

6:00 am-7:29 am

Nonstop2h 29m

Chicago O'Hare Intl

Mon 5/4

9:01 pm-11:57 pm

Nonstop1h 56m

$186

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Sat 4/11

6:00 am-7:29 am

Nonstop2h 29m

Chicago O'Hare Intl

Mon 4/13

9:01 pm-11:57 pm

Nonstop1h 56m

$188

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Wed 4/8

12:29 pm-5:54 pm

1 stop6h 25m

Chicago Midway

Fri 4/10

6:34 pm-10:51 pm

1 stop3h 17m

$188

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Mon 5/4

3:35 pm-4:45 pm

Nonstop2h 10m

Chicago Midway

Wed 5/6

7:25 pm-10:15 pm

Nonstop1h 50m

$191

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 4/16

8:00 am-9:50 am

1 stop26h 50m

Chicago O'Hare Intl

Sun 4/19

10:50 am-1:00 pm

1 stop25h 10m

$192

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 3/25

12:00 pm-1:22 pm

Nonstop2h 22m

Chicago O'Hare Intl

Wed 3/25

7:40 pm-10:52 pm

Nonstop2h 12m

$197

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Mon 5/4

2:45 pm-5:50 pm

1 stop4h 05m

Chicago Midway

Wed 5/6

7:25 pm-10:15 pm

Nonstop1h 50m

$197

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Fri 5/15

7:30 am-8:47 am

Nonstop2h 17m

Chicago O'Hare Intl

Mon 5/18

6:00 am-8:56 am

Nonstop1h 56m

$198

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Tue 3/24

6:00 am-9:10 am

1 stop4h 10m

Chicago O'Hare Intl

Tue 4/7

5:40 pm-10:51 pm

1 stop4h 11m

$199

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Wed 4/15

8:00 am-9:00 pm

2 stops38h 00m

Lambert-St Louis

Mon 4/27

8:17 pm-1:00 pm

1 stop15h 43m

$274

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 May. Flight prices, which tend to average around $275, 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 May, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $279.

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 $375. Flights from Washington, D.C. Reagan-National Airport to Illinois on a Sunday will generally be more expensive and average around $494. 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 $361. Flights at noon are often more expensive with an average ticket price of $425.

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

Fly from Washington, D.C. Reagan-National to Chicago O'Hare Intl 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 $321 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 $256 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	$170
Fastest flight time	1h 55m
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 $170. The best round-trip flight deal from Washington, D.C. Reagan-National Airport to Illinois found on momondo in the last 72 hours is $309.

The fastest flight from Washington, D.C. Reagan-National Airport to Illinois takes 1h 55m

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 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 March 2026, 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 Airbus A319 (15.48% of total bookings). The next most popular plane models are Boeing 737 MAX 8 (12.56%), Boeing 737-800 (12.33%), and Boeing 737-900 (6.54%).

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 5.7 3,040 reviews	Search Frontier flights
American Airlines	PriceFrom $154	Free Cancellation	Rating 7.1 11,370 reviews	Search American Airlines flights
Southwest	PriceFrom $179	Free Cancellation	Rating 8.0 4,303 reviews	Search Southwest flights
United Airlines	PriceFrom $189	Free Cancellation	Rating 7.4 9,370 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

Flights to New Yorkfrom $55

Flights to Los Angelesfrom $54

Flights to Miamifrom $49

Flights to Orlandofrom $46

Flights to Chicagofrom $55

Flights to San Franciscofrom $50

Flights to Las Vegasfrom $53

Flights to Washington, D.C.from $56

Flights to Bostonfrom $76

Flights to Atlantafrom $53

Flights to Dallasfrom $60

Flights to Seattlefrom $48

Cheap flights from Washington, D.C. Reagan-National Airport to Illinois from $81

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

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

Our best Delta 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

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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 to Illinois?

What cabin class options are available on Washington, D.C. Reagan-National 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

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

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?

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

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

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

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