How does KAYAK find such low prices on flights from Illinois to Washington, D.C.?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Washington, D.C..

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Washington, D.C.?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington, D.C. from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Illinois to Washington, D.C.?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Washington, D.C. with an airline and back to Illinois with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Washington, D.C.?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington, D.C. from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$59 CHEAP FLIGHTS from Illinois to Washington, D.C.

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Flight Deals

Cheap Flights from Illinois to Washington, D.C.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Illinois to Washington, D.C.

Mon, Sep 14 - Mon, Sep 21

2:29 pm - 9:25 amSTL Lambert-St Louis-BWI Baltimore/Washington

17h 56m1 stop Atlanta Hartsfield-Jackson

6:00 am - 1:10 pmBWI Baltimore/Washington-STL Lambert-St Louis

8h 10m1 stop Atlanta Hartsfield-Jackson

$135Frontier

Mon, Sep 14 - Thu, Sep 17

2:29 pm - 11:04 pmSTL Lambert-St Louis-BWI Baltimore/Washington

7h 35m1 stop Atlanta Hartsfield-Jackson

9:25 pm - 1:10 pmBWI Baltimore/Washington-STL Lambert-St Louis

16h 45m1 stop Atlanta Hartsfield-Jackson

$139Frontier

Sat, Sep 5 - Sun, Sep 6

6:55 pm - 9:59 pmORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 04mnonstop

7:02 am - 8:29 amBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 27mnonstop

$177American Airlines

Sat, Sep 5 - Sun, Sep 6

3:59 pm - 7:04 pmORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 05mnonstop

7:02 am - 8:29 amBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 27mnonstop

$177American Airlines

Sat, Sep 5 - Sun, Sep 6

3:23 pm - 6:30 pmORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 07mnonstop

1:00 pm - 2:21 pmBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 21mnonstop

$177United Airlines

Fri, Sep 11 - Fri, Sep 11

9:00 am - 11:55 amMDW Chicago Midway-BWI Baltimore/Washington

1h 55mnonstop

8:00 pm - 9:00 pmBWI Baltimore/Washington-MDW Chicago Midway

2h 00mnonstop

$177Southwest

Tue, Sep 1 - Sat, Sep 5

7:00 am - 10:09 amORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 09mnonstop

1:00 pm - 2:21 pmBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 21mnonstop

$181United Airlines

Wed, Sep 2 - Sat, Sep 5

12:45 pm - 3:30 pmMDW Chicago Midway-BWI Baltimore/Washington

1h 45mnonstop

7:30 pm - 8:35 pmBWI Baltimore/Washington-MDW Chicago Midway

2h 05mnonstop

$181Southwest

Sat, Sep 12 - Wed, Sep 16

7:11 am - 6:33 pmORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

10h 22m2 stops Fort Lauderdale Tampa

6:13 pm - 2:45 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

21h 32m1 stop Fort Lauderdale

$188Multiple Airlines

Sat, Sep 12 - Mon, Sep 14

7:11 am - 6:33 pmORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

10h 22m2 stops Fort Lauderdale Tampa

6:13 pm - 3:20 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

22h 07m1 stop Fort Lauderdale

$189Multiple Airlines

Recent last minute flight deals from Illinois to Washington, D.C.

Sat, Aug 15 - Thu, Aug 20

11:06 am - 9:59 pmMDW Chicago Midway-BWI Baltimore/Washington

9h 53m1 stop Atlanta Hartsfield-Jackson

6:28 pm - 10:47 pmBWI Baltimore/Washington-MDW Chicago Midway

5h 19m1 stop Atlanta Hartsfield-Jackson

$236Frontier

Fri, Aug 14 - Tue, Aug 18

11:06 am - 6:33 pmMDW Chicago Midway-BWI Baltimore/Washington

6h 27m1 stop Atlanta Hartsfield-Jackson

6:28 pm - 10:47 pmBWI Baltimore/Washington-MDW Chicago Midway

5h 19m1 stop Atlanta Hartsfield-Jackson

$236Frontier

Sat, Aug 15 - Sat, Sep 12

6:55 pm - 9:59 pmORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 04mnonstop

6:00 am - 7:29 amBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 29mnonstop

$324American Airlines

Thu, Aug 13 - Mon, Sep 7

8:52 pm - 11:59 pmORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 07mnonstop

7:03 am - 8:30 amBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 27mnonstop

$340American Airlines

Thu, Aug 13 - Mon, Sep 7

10:30 am - 1:15 pmMDW Chicago Midway-BWI Baltimore/Washington

1h 45mnonstop

6:30 am - 7:30 amBWI Baltimore/Washington-MDW Chicago Midway

2h 00mnonstop

$340Southwest

Tue, Aug 18 - Mon, Aug 31

6:00 am - 12:42 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

5h 42m1 stop New York LaGuardia

11:00 am - 5:06 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

7h 06m1 stop New York John F Kennedy Intl

$344Delta

Thu, Aug 13 - Mon, Sep 7

1:05 pm - 5:15 pmMDW Chicago Midway-BWI Baltimore/Washington

3h 10m1 stop Grand Rapids Gerald R. Ford Intl

6:30 am - 7:30 amBWI Baltimore/Washington-MDW Chicago Midway

2h 00mnonstop

$346Southwest

Sat, Aug 15 - Tue, Aug 18

6:15 pm - 9:29 pmORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 14mnonstop

5:40 pm - 7:00 pmBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 20mnonstop

$387United Airlines

Sat, Aug 15 - Thu, Sep 10

8:40 am - 11:54 amSTL Lambert-St Louis-IAD Washington, D.C. Dulles Intl

2h 14mnonstop

8:25 am - 9:39 amIAD Washington, D.C. Dulles Intl-STL Lambert-St Louis

2h 14mnonstop

$395United Airlines

Fri, Aug 14 - Thu, Sep 17

5:10 pm - 12:34 amMDW Chicago Midway-IAD Washington, D.C. Dulles Intl

6h 24m1 stop Atlanta Hartsfield-Jackson

6:10 am - 9:07 amIAD Washington, D.C. Dulles Intl-MDW Chicago Midway

3h 57m1 stop Detroit Metropolitan Wayne County

$416Delta

Recent direct flight deals from Illinois to Washington, D.C.

Thu, Sep 24 - Thu, Oct 1

6:20 am - 9:25 amORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 05mnonstop

10:20 am - 11:40 amBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 20mnonstop

$139Frontier

Fri, Oct 23 - Mon, Oct 26

7:00 am - 10:14 amORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 14mnonstop

11:09 am - 12:32 pmBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 23mnonstop

$141Frontier

Wed, Oct 14 - Mon, Oct 19

7:00 am - 10:14 amORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 14mnonstop

11:09 am - 12:32 pmBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 23mnonstop

$141Frontier

Fri, Sep 11 - Fri, Sep 11

9:00 am - 11:55 amMDW Chicago Midway-BWI Baltimore/Washington

1h 55mnonstop

8:00 pm - 9:00 pmBWI Baltimore/Washington-MDW Chicago Midway

2h 00mnonstop

$177Southwest

Sat, Sep 5 - Sun, Sep 6

6:55 pm - 9:59 pmORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 04mnonstop

7:02 am - 8:29 amBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 27mnonstop

$177American Airlines

Sat, Sep 5 - Sun, Sep 6

3:59 pm - 7:04 pmORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 05mnonstop

7:02 am - 8:29 amBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 27mnonstop

$177American Airlines

Sat, Sep 5 - Sun, Sep 6

3:23 pm - 6:30 pmORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 07mnonstop

1:00 pm - 2:21 pmBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 21mnonstop

$177United Airlines

Wed, Sep 2 - Sat, Sep 5

12:45 pm - 3:30 pmMDW Chicago Midway-BWI Baltimore/Washington

1h 45mnonstop

7:30 pm - 8:35 pmBWI Baltimore/Washington-MDW Chicago Midway

2h 05mnonstop

$181Southwest

Tue, Sep 1 - Sat, Sep 5

7:00 am - 10:09 amORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 09mnonstop

1:00 pm - 2:21 pmBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 21mnonstop

$181United Airlines

Thu, Oct 15 - Mon, Oct 19

4:50 pm - 7:59 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 09mnonstop

4:59 pm - 6:25 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 26mnonstop

$8,650Alaska Airlines

Useful Info

Low season	February
High season	October
Cheapest flight	$59

Best time to beat the crowds with an average 20% drop in price.

Most popular time to fly and prices are also 3% lower on average.

Flight from St. Louis to Washington Dulles Airport

How does KAYAK find such low prices on flights from Illinois to Washington, D.C.?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Washington, D.C..
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Washington, D.C.?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington, D.C. from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Illinois to Washington, D.C.?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Washington, D.C. with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Washington, D.C.?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington, D.C. from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Linthicum Heights

Hanover

Springfield

Gaithersburg

Towson

Oxon Hill

Owings Mills

Greenbelt

Glen Burnie

Edgewood

Chesapeake Beach

Ellicott City

Camp Springs

Pikesville

Colonial Beach

Hunt Valley

Lutherville Timonium

Capitol Heights

Westminster

Stevensville

Everything you need to know for your flight to Washington, D.C.

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Cabin class types available on flights to Illinois

First Class flights to Washington, D.C.from $477

Business Class flights to Washington, D.C.from $499

Premium Economy Class flights to Washington, D.C.from $487

Economy Class flights to Washington, D.C.from $66

$59 Find Cheap Flights from Illinois to Washington, D.C. - Compare and Save

Cheap Flights from Illinois to Washington, D.C.

Recent round-trip flight deals from Illinois to Washington, D.C.

Recent one-way flight deals from Illinois to Washington, D.C.

Recent last minute flight deals from Illinois to Washington, D.C.

Recent direct flight deals from Illinois to Washington, D.C.

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FAQs for booking flights from Illinois to Washington, D.C.

Traveling to a place near Washington, D.C.?

Everything you need to know for your flight to Washington, D.C.

Cabin class types available on flights to Illinois

Complete your trip to Washington, D.C. with a hotel stay or car rental

Find direct flights for Washington, D.C.

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Flights from domestic origins to Washington, D.C.

Choose which airport to fly into in Washington, D.C.

Find deals for your return flight