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. according to our data. United 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 6 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

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 08m 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 10m.

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

As of September 2025, 838 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?

119 flights are operational daily from Washington, D.C. to Illinois as of September 2025. The most popular departure time for this route is 5:00PM, with 43% of flights per day taking off at noon.

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

Frontier, American Airlines, and Spirit 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 September 2025.

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.

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

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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

9:59 pm - 11:20 pmBWI-ORD

2h 21mnonstop

11:45 am - 7:07 pmORD-BWI

6h 22m1 stop

$105Frontier

Find Deal

lun., sep. 29 - mar., sep. 30

4:02 pm - 5:18 pmBWI-ORD

2h 16mnonstop

12:11 pm - 3:14 pmORD-BWI

2h 03mnonstop

$106Frontier

Find Deal

vie., nov. 14 - dom., nov. 16

4:00 pm - 1:03 amBWI-ORD

10h 03m1 stop

3:11 pm - 6:05 pmORD-BWI

1h 54mnonstop

$137Spirit Airlines

Find Deal

mar., nov. 4 - vie., nov. 7

10:48 am - 11:42 pmBWI-ORD

13h 54m1 stop

7:56 pm - 10:54 pmORD-BWI

1h 58mnonstop

$138Spirit Airlines

Find Deal

vie., nov. 14 - dom., nov. 16

5:20 pm - 6:35 pmBWI-ORD

2h 15mnonstop

2:20 pm - 5:14 pmORD-BWI

1h 54mnonstop

$139United Airlines

Find Deal

sáb., oct. 25 - mar., oct. 28

5:30 pm - 6:30 pmBWI-MDW

2h 00mnonstop

7:40 pm - 10:30 pmMDW-BWI

1h 50mnonstop

$139Southwest

Find Deal

mar., oct. 21 - mié., oct. 22

5:20 pm - 6:35 pmBWI-ORD

2h 15mnonstop

7:00 am - 9:55 amORD-BWI

1h 55mnonstop

$149United Airlines

Find Deal

mar., oct. 14 - mar., oct. 21

2:30 pm - 3:30 pmBWI-MDW

2h 00mnonstop

5:50 am - 8:35 amMDW-BWI

1h 45mnonstop

$158Southwest

Find Deal

sáb., oct. 25 - lun., oct. 27

6:13 pm - 11:54 pmBWI-STL

6h 41m1 stop

4:25 pm - 9:54 pmSTL-BWI

4h 29m1 stop

$159American Airlines

Find Deal

mié., oct. 8 - sáb., oct. 11

1:44 pm - 6:46 pmDCA-STL

6h 02m1 stop

6:08 pm - 9:10 pmSTL-DCA

2h 02mnonstop

$204American Airlines

Find Deal

mar., oct. 7 - mar., oct. 14

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

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

Spirit Airlines

Nov 4

BWI4:00 pmBaltimore/Washington

10h 03m

1 stop

ORD1:03 amChicago O'Hare Intl

Nov 7

ORD3:11 pmChicago O'Hare Intl

1h 54m

BWI6:05 pmBaltimore/Washington

$137

Find similar

Spirit Airlines

Nov 14

BWI10:48 amBaltimore/Washington

13h 54m

1 stop

ORD11:42 pmChicago O'Hare Intl

Nov 16

ORD7:56 pmChicago O'Hare Intl

1h 58m

BWI10:54 pmBaltimore/Washington

$138

Find similar

Spirit Airlines

Dec 12

BWI9:37 pmBaltimore/Washington

20h 27m

1 stop

ORD5:04 pmChicago O'Hare Intl

Dec 14

ORD7:56 pmChicago O'Hare Intl

1h 58m

BWI10:54 pmBaltimore/Washington

$156

Find similar

Frontier flights from Washington, D.C. to Illinois

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

Frontier

Sep 29

BWI9:59 pmBaltimore/Washington

2h 21m

ORD11:20 pmChicago O'Hare Intl

Sep 30

ORD11:45 amChicago O'Hare Intl

6h 22m

1 stop

BWI7:07 pmBaltimore/Washington

$105

Find similar

Frontier

Nov 14

BWI4:02 pmBaltimore/Washington

2h 16m

ORD5:18 pmChicago O'Hare Intl

Nov 16

ORD12:11 pmChicago O'Hare Intl

2h 03m

BWI3:14 pmBaltimore/Washington

$106

Find similar

Frontier

Oct 24

BWI4:46 pmBaltimore/Washington

2h 29m

ORD6:15 pmChicago O'Hare Intl

Oct 26

ORD4:50 pmChicago O'Hare Intl

2h 03m

BWI7:53 pmBaltimore/Washington

$107

Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

lun. 9/29

9:59 pm-11:20 pm

Nonstop2h 21m

Chicago O'Hare Intl

mar. 9/30

11:45 am-7:07 pm

1 stop6h 22m

$105

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

vie. 11/14

4:02 pm-5:18 pm

Nonstop2h 16m

Chicago O'Hare Intl

dom. 11/16

12:11 pm-3:14 pm

Nonstop2h 03m

$106

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

mar. 11/4

4:00 pm-1:03 am

1 stop10h 03m

Chicago O'Hare Intl

vie. 11/7

3:11 pm-6:05 pm

Nonstop1h 54m

$137

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

vie. 11/14

10:48 am-11:42 pm

1 stop13h 54m

Chicago O'Hare Intl

dom. 11/16

7:56 pm-10:54 pm

Nonstop1h 58m

$138

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

sáb. 10/25

5:20 pm-6:35 pm

Nonstop2h 15m

Chicago O'Hare Intl

mar. 10/28

2:20 pm-5:14 pm

Nonstop1h 54m

$139

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

mar. 10/21

5:30 pm-6:30 pm

Nonstop2h 00m

Chicago Midway

mié. 10/22

7:40 pm-10:30 pm

Nonstop1h 50m

$139

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

mar. 10/14

5:20 pm-6:35 pm

Nonstop2h 15m

Chicago O'Hare Intl

mar. 10/21

7:00 am-9:55 am

Nonstop1h 55m

$149

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

sáb. 10/25

2:30 pm-3:30 pm

Nonstop2h 00m

Chicago Midway

lun. 10/27

5:50 am-8:35 am

Nonstop1h 45m

$158

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

mié. 10/8

6:13 pm-11:54 pm

1 stop6h 41m

Lambert-St Louis

sáb. 10/11

4:25 pm-9:54 pm

1 stop4h 29m

$159

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

mar. 10/7

1:44 pm-6:46 pm

1 stop6h 02m

Lambert-St Louis

mar. 10/14

6:08 pm-9:10 pm

Nonstop2h 02m

$204

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 September. Flight prices, which tend to average around $217, 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 $227.

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 $403. Flights from Washington, D.C. to Illinois on a Monday will generally be more expensive and average around $542. 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 $310. Flights in the afternoon are often more expensive with an average ticket price of $491.

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

Fly from Baltimore/Washington to Chicago Midway 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 $329 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 $254 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	$84
Fastest flight time	1h 55m
Direct flights	Every day
Airports in Illinois	2 airports

The best one-way flight to Illinois from Washington, D.C. in the past 72 hours is $84. The best round-trip flight deal from Washington, D.C. to Illinois found on momondo in the last 72 hours is $139.

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 2 airports near Illinois: Chicago O'Hare Intl (ORD), 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 September 2025.
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 737-800 (11.21% of total bookings). The next most popular plane models are Airbus A320-100/200 (10.45%), Airbus A319 (9.44%), and Airbus A320neo (9.29%).

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 $46	Free Cancellation	Rating 6.3 8,023 reviews	Search Spirit Airlines flights
Frontier	PriceFrom $62	Free Cancellation	Rating 5.8 3,173 reviews	Search Frontier flights
Delta	PriceFrom $98	Free Cancellation	Rating 7.9 7,961 reviews	Search Delta flights
American Airlines	PriceFrom $154	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Southwest	PriceFrom $157	Free Cancellation	Rating 8.0 4,242 reviews	Search Southwest flights
United Airlines	PriceFrom $158	Free Cancellation	Rating 7.4 8,926 reviews	Search United 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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Popular cities in Illinois

Flights to New Yorkfrom $49

Flights to Los Angelesfrom $49

Flights to Miamifrom $49

Flights to Chicagofrom $49

Flights to Orlandofrom $60

Flights to Las Vegasfrom $48

Flights to San Franciscofrom $53

Flights to Washington, D.C.from $49

Flights to Bostonfrom $62

Flights to Atlantafrom $51

Flights to Dallasfrom $68

Flights to Seattlefrom $69

Washington, D.C. flight routes

Flights from Washington, D.C. Dulles Intl to Wilmington New Hanover County

Flights from Baltimore/Washington to Wilmington New Hanover County

Flights from Baltimore/Washington to Tweed-New Haven

Flights from Baltimore/Washington to Tampa

Flights from Baltimore/Washington to Miami

Flights from Baltimore/Washington to Detroit Metropolitan Wayne County

Cheap flights from Washington, D.C. to Illinois from $63

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 10/6. 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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Big names and deals

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Filter for what you want

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

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

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

Frontier flights from Washington, D.C. to Illinois

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

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

See travel insights to Illinois from

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

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. to Illinois during this time can be as low as $310. Flights in the afternoon are often more expensive with an average ticket price of $491.

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

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

How far in advance should I book a flight to Illinois?

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.

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

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

119 flights are operational daily from Washington, D.C. to Illinois as of September 2025. The most popular departure time for this route is 5:00PM, with 43% of flights per day taking off at noon.

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

As of September 2025, 838 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 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

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

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

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

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

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

What is the most popular plane model 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?

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