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 05m 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 14m.

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

103 flights are operational daily from Washington, D.C. to Illinois as of March 2026. The most popular departure time for this route is 5:00PM, with 45% of flights per day taking off in the afternoon.

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 47% 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 March 2026, 721 flights take off from Washington, D.C. and land in Illinois each week. The most common flight departure day for this route is Fri, with 17% of weekly flights taking off on this day.

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

Frontier, Southwest, and United Airlines are the most popular carriers operating 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 March 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.

$70 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.

1:04 pm - 11:58 pm

BWI

STL

11h 54m

1 stop

8:23 pm - 8:02 am

STL

BWI

10h 39m

1 stop

$140Frontier

vie., abr. 10 - mié., abr. 15

6:00 am - 5:00 pm

BWI

ORD

12h 00m

1 stop

6:08 pm - 11:22 am

ORD

BWI

16h 14m

1 stop

$145Frontier

mié., abr. 22 - mar., abr. 28

5:09 pm - 6:35 pm

BWI

ORD

2h 26mnonstop

12:45 pm - 11:59 pm

ORD

BWI

10h 14m

1 stop

$152Multiple Airlines

jue., abr. 9 - mar., abr. 14

5:53 pm - 10:23 am

BWI

ORD

17h 30m

1 stop

1:59 pm - 10:57 pm

ORD

BWI

7h 58m

1 stop

$153Multiple Airlines

sáb., may. 2 - mié., may. 6

1:45 pm - 3:09 pm

DCA

ORD

2h 24mnonstop

4:00 pm - 7:05 pm

ORD

DCA

2h 05mnonstop

$209American Airlines

mar., abr. 14 - mar., abr. 21

3:40 pm - 4:50 pm

DCA

MDW

2h 10mnonstop

1:30 pm - 4:15 pm

MDW

DCA

1h 45mnonstop

$209Southwest

mar., abr. 14 - mar., abr. 21

11:35 am - 12:55 pm

DCA

ORD

2h 20mnonstop

2:57 pm - 6:00 pm

ORD

DCA

2h 03mnonstop

$210American Airlines

mié., jun. 3 - mié., jun. 10

3:40 pm - 4:50 pm

DCA

MDW

2h 10mnonstop

1:55 pm - 6:40 pm

MDW

DCA

3h 45m

1 stop

$215Southwest

mar., abr. 21 - mié., abr. 22

3:30 pm - 4:50 pm

DCA

ORD

2h 20mnonstop

11:15 am - 2:14 pm

ORD

DCA

1h 59mnonstop

$224United Airlines

mar., abr. 14 - jue., abr. 16

5:45 pm - 7:22 pm

IAD

STL

2h 37mnonstop

6:30 am - 11:48 am

STL

IAD

4h 18m

1 stop

$275United Airlines

sáb., abr. 11 - lun., abr. 13

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

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

Spirit Airlines

Mar 23

BWI10:09 amBaltimore/Washington

10h 54m

1 stop

ORD8:03 pmChicago O'Hare Intl

Mar 26

ORD12:45 pmChicago O'Hare Intl

5h 59m

1 stop

BWI7:44 pmBaltimore/Washington

$162

Spirit Airlines

Mar 23

BWI10:09 amBaltimore/Washington

10h 54m

1 stop

ORD8:03 pmChicago O'Hare Intl

Mar 31

ORD12:45 pmChicago O'Hare Intl

10h 14m

1 stop

BWI11:59 pmBaltimore/Washington

$163

Spirit Airlines

Apr 7

BWI10:19 amBaltimore/Washington

7h 56m

1 stop

ORD5:15 pmChicago O'Hare Intl

Apr 9

ORD7:17 amChicago O'Hare Intl

10h 28m

1 stop

BWI6:45 pmBaltimore/Washington

$167

Frontier flights from Washington, D.C. to Illinois

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

Frontier

Apr 10

BWI1:04 pmBaltimore/Washington

11h 54m

1 stop

STL11:58 pmLambert-St Louis

Apr 15

STL8:23 pmLambert-St Louis

10h 39m

1 stop

BWI8:02 amBaltimore/Washington

$140

Frontier

Apr 22

BWI6:00 amBaltimore/Washington

12h 00m

1 stop

ORD5:00 pmChicago O'Hare Intl

Apr 28

ORD6:08 pmChicago O'Hare Intl

16h 14m

1 stop

BWI11:22 amBaltimore/Washington

$145

Frontier

Apr 12

BWI12:08 pmBaltimore/Washington

20h 43m

1 stop

STL7:51 amLambert-St Louis

Apr 15

STL8:23 pmLambert-St Louis

10h 39m

1 stop

BWI8:02 amBaltimore/Washington

$151

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

vie. 4/10

1:04 pm-11:58 pm

1 stop11h 54m

Lambert-St Louis

mié. 4/15

8:23 pm-8:02 am

1 stop10h 39m

$140

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

mié. 4/22

6:00 am-5:00 pm

1 stop12h 00m

Chicago O'Hare Intl

mar. 4/28

6:08 pm-11:22 am

1 stop16h 14m

$145

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

jue. 4/9

5:09 pm-6:35 pm

Nonstop2h 26m

Chicago O'Hare Intl

mar. 4/14

12:45 pm-11:59 pm

1 stop10h 14m

$152

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

sáb. 5/2

5:53 pm-10:23 am

1 stop17h 30m

Chicago O'Hare Intl

mié. 5/6

1:59 pm-10:57 pm

1 stop7h 58m

$153

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

mar. 4/14

1:45 pm-3:09 pm

Nonstop2h 24m

Chicago O'Hare Intl

mar. 4/21

4:00 pm-7:05 pm

Nonstop2h 05m

$209

Quickest round-trip

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

mar. 4/14

3:40 pm-4:50 pm

Nonstop2h 10m

Chicago Midway

mar. 4/21

1:30 pm-4:15 pm

Nonstop1h 45m

$209

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

mié. 6/3

11:35 am-12:55 pm

Nonstop2h 20m

Chicago O'Hare Intl

mié. 6/10

2:57 pm-6:00 pm

Nonstop2h 03m

$210

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

mar. 4/21

3:40 pm-4:50 pm

Nonstop2h 10m

Chicago Midway

mié. 4/22

1:55 pm-6:40 pm

1 stop3h 45m

$215

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

mar. 4/14

3:30 pm-4:50 pm

Nonstop2h 20m

Chicago O'Hare Intl

jue. 4/16

11:15 am-2:14 pm

Nonstop1h 59m

$224

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

sáb. 4/11

5:45 pm-7:22 pm

Nonstop2h 37m

Lambert-St Louis

lun. 4/13

6:30 am-11:48 am

1 stop4h 18m

$275

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. 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

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Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Washington, D.C. is in September. Flight prices, which tend to average around $203, 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 September, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $224.

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 $393. Flights from Washington, D.C. to Illinois on a Monday will generally be more expensive and average around $564. 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 $390. Flights in the morning are often more expensive with an average ticket price of $452.

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 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 $353 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 $199 on momondo.

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

There are 4 cabin classes available to choose from on Washington, D.C. 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. 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	$175
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 $175. The best round-trip flight deal from Washington, D.C. to Illinois found on momondo in the last 72 hours is $283.

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 Midway (MDW).

Search flight deals

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 March 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 (13.61% of total bookings). The next most popular plane models are Airbus A319 (11.91%), Boeing 737-800 (11.57%), and Boeing 737-900 (9.50%).

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
Frontier	PriceFrom $29	Free Cancellation	Rating 5.7 3,022 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $41	Free Cancellation	Rating 6.3 8,533 reviews	Search Spirit Airlines flights
United Airlines	PriceFrom $131	Free Cancellation	Rating 7.4 9,451 reviews	Search United Airlines flights
Southwest	PriceFrom $139	Free Cancellation	Rating 8.0 4,325 reviews	Search Southwest flights
American Airlines	PriceFrom $154	Free Cancellation	Rating 7.1 11,487 reviews	Search American Airlines flights
Delta	PriceFrom $194	Free Cancellation	Rating 7.9 8,313 reviews	Search Delta 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 $66

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Flights to Las Vegasfrom $57

Flights to Washington, D.C.from $59

Flights to Bostonfrom $70

Flights to Atlantafrom $49

Flights to Dallasfrom $60

Flights to Seattlefrom $71

Cheap flights from Washington, D.C. to Illinois from $70

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 4/8. 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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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 to Illinois?

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

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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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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