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

Frontier, Delta, and Southwest are the most popular carriers operating from Washington, D.C. to Illinois

How long is the flight from Washington, D.C. to Illinois?

The flight from Washington, D.C. to Illinois depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Washington, D.C. (a popular airport in Washington, D.C.) to Chicago O'Hare Intl Airport (the most popular airport in Illinois), then the flight time is 2h 03m on average. If you fly from Baltimore (another popular airport in Washington, D.C.) to Chicago O'Hare Intl Airport, then the average flight time is 2h 12m.

What airlines fly to Illinois?

United Airlines, American Airlines and Frontier are the top three most popular airlines that fly to Illinois from Washington, D.C. according to our data. United Airlines is the first choice among our users, with 49% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 6 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

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

As of May 2026, 894 flights take off from Washington, D.C. and land in Illinois each week. The most common flight departure day for this route is Mon, with 17% of weekly flights taking off on this day.

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

127 flights are operational daily from Washington, D.C. to Illinois as of May 2026. The most popular departure time for this route is 3:00PM, with 43% of flights per day taking off at noon.

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

Prices for flights from Washington, D.C. to Illinois were last updated today.

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

The number of operators available for flights from Washington, D.C. to Illinois is 6 as of May 2026.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. to Illinois.

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

The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$59 Cheap Flights from Washington, D.C. to Illinois in 2026

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Find the cheapest flights from Washington, D.C. to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:52 am - 5:33 pm

BWI

STL

9h 41m

1 stop

5:27 pm - 7:35 am

STL

BWI

13h 08m

1 stop

$124Frontier

Thu, Jun 4 - Mon, Jun 8

9:13 pm - 8:55 am

BWI

STL

12h 42m

1 stop

5:27 pm - 7:35 am

STL

BWI

13h 08m

1 stop

$125Frontier

Tue, May 26 - Mon, Jun 8

8:25 am - 9:39 am

BWI

ORD

2h 14mnonstop

6:20 pm - 9:26 pm

ORD

BWI

2h 06mnonstop

$212United Airlines

Wed, May 27 - Thu, Jun 4

9:35 am - 10:40 am

BWI

MDW

2h 05mnonstop

7:00 am - 9:50 am

MDW

BWI

1h 50mnonstop

$212Southwest

Wed, May 27 - Tue, Jun 2

7:10 pm - 8:20 pm

BWI

MDW

2h 10mnonstop

7:50 am - 12:10 pm

MDW

BWI

3h 20m

1 stop

$218Southwest

Mon, Jun 1 - Wed, Jun 3

7:30 pm - 11:59 pm

DCA

ORD

5h 29m

1 stop

2:00 pm - 6:59 pm

ORD

DCA

3h 59m

1 stop

$228Delta

Wed, May 27 - Thu, Jun 4

4:24 pm - 8:24 pm

IAD

ORD

5h 00m

1 stop

6:07 am - 12:18 pm

ORD

IAD

5h 11m

1 stop

$228Delta

Sat, May 23 - Tue, May 26

10:10 pm - 11:30 pm

DCA

ORD

2h 20mnonstop

7:10 am - 10:13 am

ORD

DCA

2h 03mnonstop

$231American Airlines

Thu, Jun 25 - Tue, Jun 30

8:10 pm - 9:32 pm

DCA

ORD

2h 22mnonstop

4:00 pm - 6:52 pm

ORD

DCA

1h 52mnonstop

$233United Airlines

Wed, Jul 1 - Sat, Aug 15

3:52 pm - 5:25 pm

DCA

ORD

2h 33mnonstop

2:57 pm - 6:00 pm

ORD

DCA

2h 03mnonstop

$234American Airlines

Sat, Jun 13 - Tue, Jun 16

American Airlines flights from Washington, D.C. to Illinois

Our best American Airlines deals on Washington, D.C. to Illinois flight tickets

American Airlines

Jun 3

BWI10:34 amBaltimore/Washington

2h 18m

ORD11:52 amChicago O'Hare Intl

Jun 10

ORD12:00 pmChicago O'Hare Intl

4h 46m

1 stop

BWI5:46 pmBaltimore/Washington

$222

American Airlines

May 23

DCA3:52 pmWashington, D.C. Reagan-National

2h 35m

ORD5:27 pmChicago O'Hare Intl

May 26

ORD5:57 amChicago O'Hare Intl

2h 16m

DCA9:13 amWashington, D.C. Reagan-National

$231

American Airlines

Jun 13

DCA3:52 pmWashington, D.C. Reagan-National

2h 33m

ORD5:25 pmChicago O'Hare Intl

Jun 16

ORD2:57 pmChicago O'Hare Intl

2h 03m

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

$234

United Airlines flights from Washington, D.C. to Illinois

Our best United Airlines deals on Washington, D.C. to Illinois flight tickets

United Airlines

May 27

BWI8:25 amBaltimore/Washington

2h 14m

ORD9:39 amChicago O'Hare Intl

Jun 4

ORD6:20 pmChicago O'Hare Intl

2h 06m

BWI9:26 pmBaltimore/Washington

$212

United Airlines

May 29

BWI8:25 amBaltimore/Washington

2h 14m

ORD9:39 amChicago O'Hare Intl

Jun 2

ORD9:25 pmChicago O'Hare Intl

2h 08m

BWI12:33 amBaltimore/Washington

$227

United Airlines

Jul 1

DCA6:30 amWashington, D.C. Reagan-National

2h 16m

ORD7:46 amChicago O'Hare Intl

Jul 8

ORD6:00 amChicago O'Hare Intl

1h 54m

DCA8:54 amWashington, D.C. Reagan-National

$233

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Thu 6/4

8:52 am-5:33 pm

1 stop9h 41m

Lambert-St Louis

Mon 6/8

5:27 pm-7:35 am

1 stop13h 08m

$124

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Tue 5/26

9:13 pm-8:55 am

1 stop12h 42m

Lambert-St Louis

Mon 6/8

5:27 pm-7:35 am

1 stop13h 08m

$125

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Wed 5/27

8:25 am-9:39 am

Nonstop2h 14m

Chicago O'Hare Intl

Thu 6/4

6:20 pm-9:26 pm

Nonstop2h 06m

$212

Quickest round-trip

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Wed 5/27

9:35 am-10:40 am

Nonstop2h 05m

Chicago Midway

Tue 6/2

7:00 am-9:50 am

Nonstop1h 50m

$212

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Mon 6/1

7:10 pm-8:20 pm

Nonstop2h 10m

Chicago Midway

Wed 6/3

7:50 am-12:10 pm

1 stop3h 20m

$218

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 5/27

7:30 pm-11:59 pm

1 stop5h 29m

Chicago O'Hare Intl

Thu 6/4

2:00 pm-6:59 pm

1 stop3h 59m

$228

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Sat 5/23

4:24 pm-8:24 pm

1 stop5h 00m

Chicago O'Hare Intl

Tue 5/26

6:07 am-12:18 pm

1 stop5h 11m

$228

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 6/25

10:10 pm-11:30 pm

Nonstop2h 20m

Chicago O'Hare Intl

Tue 6/30

7:10 am-10:13 am

Nonstop2h 03m

$231

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 7/1

8:10 pm-9:32 pm

Nonstop2h 22m

Chicago O'Hare Intl

Sat 8/15

4:00 pm-6:52 pm

Nonstop1h 52m

$233

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Sat 6/13

3:52 pm-5:25 pm

Nonstop2h 33m

Chicago O'Hare Intl

Tue 6/16

2:57 pm-6:00 pm

Nonstop2h 03m

$234

Flights are sorted by cheapest round-trip flights first.

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How to get the cheapest flight ticket from Washington, D.C. 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. is in August. Flight prices, which tend to average around $209, 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 August, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $219.

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

The cheapest day to depart from Washington, D.C. to Illinois is on a Friday when prices can be found for as low as $407. Flights from Washington, D.C. to Illinois on a Monday will generally be more expensive and average around $585. 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. to Illinois during this time can be as low as $421. Flights in the afternoon are often more expensive with an average ticket price of $459.

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

Fly from Baltimore/Washington to Chicago O'Hare Intl for the best Washington, D.C. - Illinois flight prices

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

You are more likely to see cheaper flights to Illinois from Washington, D.C. when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $374 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. for as low as $201 on momondo.

Can stopping save me money on Washington, D.C. to Illinois flights?

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

Cheap Washington, D.C. to Illinois flight deals and tips

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

Best Price Found	$176
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. in the past 72 hours is $176. The best round-trip flight deal from Washington, D.C. to Illinois found on momondo in the last 72 hours is $309.

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

Direct flights go from Washington, D.C. to Illinois every day.

There are 98 airports in Illinois. From Washington, D.C. 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. to Illinois

When did momondo last update prices for flights from Washington, D.C. to Illinois?
Prices for flights from Washington, D.C. to Illinois were last updated today.
How many operators does momondo search for flights from Washington, D.C. to Illinois?
The number of operators available for flights from Washington, D.C. to Illinois is 6 as of May 2026.
How old do you have to be to fly from Washington, D.C. to Illinois?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Washington, D.C. to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Washington, D.C. to Illinois is Boeing 737 MAX 8 (14.49% of total bookings). The next most popular plane models are Boeing 737-800 (12.58%), Airbus A319 (11.31%), and Boeing 737-900 (9.37%).

Best airlines flying from Washington, D.C. to Illinois

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

Airline	Rating	Free Cancellation	Price
Spirit Airlines	PriceFrom $43	Free Cancellation	Rating 6.3 8,634 reviews	Search Spirit Airlines flights
Frontier	PriceFrom $57	Free Cancellation	Rating 5.6 2,966 reviews	Search Frontier flights
United Airlines	PriceFrom $131	Free Cancellation	Rating 7.4 9,683 reviews	Search United Airlines flights
Southwest	PriceFrom $134	Free Cancellation	Rating 7.9 4,305 reviews	Search Southwest flights
Delta	PriceFrom $149	Free Cancellation	Rating 7.9 8,459 reviews	Search Delta flights
American Airlines	PriceFrom $154	Free Cancellation	Rating 7.1 11,668 reviews	Search American Airlines flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to Illinois for you.

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

Yes. momondo enables you to select and highlight flights to Illinois from Washington, D.C. with this policy.

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

momondo provides multiple filters to help you find the best flight to Illinois from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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 can track prices for Washington, D.C. to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Flights to New Yorkfrom $71

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Flights to Chicagofrom $69

Flights to San Franciscofrom $76

Flights to Las Vegasfrom $56

Flights to Washington, D.C.from $55

Flights to Bostonfrom $92

Flights to Atlantafrom $50

Flights to Dallasfrom $76

Flights to Fort Lauderdalefrom $52

Cheap flights from Washington, D.C. to Illinois from $59

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to Illinois departing on 6/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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American Airlines flights from Washington, D.C. to Illinois

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How to get the cheapest flight ticket from Washington, D.C. 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. to Illinois flight route?

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

Can stopping save me money on Washington, D.C. to Illinois flights?

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

What airlines fly to Illinois?

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

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

How long is the flight from Washington, D.C. to Illinois?

Cheap Washington, D.C. to Illinois flight deals and tips

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

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Fastest flight time

Direct flights

Airports in Illinois

Frequently asked questions about flying from Washington, D.C. to Illinois

Best airlines flying from Washington, D.C. to Illinois

Compare and see reviews for airlines that fly from Washington, D.C. 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.

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Find better results for your trip to Illinois

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