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.. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

$41 CHEAP FLIGHTS from Illinois to Washington, D.C.

KAYAK searches hundreds of travel sites at once for deals on flights to Washington, D.C.

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Cheapest round-trip

$94

Overall average: $287

Frontier

Thu 2/12Sun 2/15

ORD - BWI • Non-stop

Cheapest one-way

$41

Typical prices: $159-$387

Frontier

Tue 12/23

STL - BWI • 1 stop

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Washington, D.C.!

Flight Deals

Cheap Flights from Illinois to Washington, D.C.

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to Washington, D.C. that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

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.

Thu, Feb 12 - Sun, Feb 15

5:01 am - 8:03 amORD-BWI

2h 02mnonstop

8:58 am - 10:22 amBWI-ORD

2h 24mnonstop

$94Frontier

Find Deal

Fri, Dec 19 - Mon, Dec 22

1:40 pm - 4:47 pmORD-BWI

2h 07mnonstop

10:12 am - 11:30 amBWI-ORD

2h 18mnonstop

$97Frontier

Find Deal

Mon, Nov 24 - Tue, Dec 2

12:25 pm - 3:21 pmMDW-BWI

1h 56mnonstop

6:29 pm - 8:46 amBWI-MDW

15h 17m1 stop

$107Multiple Airlines

Find Deal

Mon, Nov 17 - Mon, Nov 24

6:06 pm - 12:55 pmMDW-BWI

41h 49m2 stops

4:06 pm - 5:15 pmBWI-MDW

2h 09mnonstop

$116Multiple Airlines

Find Deal

Thu, Jan 15 - Sun, Jan 18

7:05 pm - 9:55 pmMDW-BWI

1h 50mnonstop

5:50 pm - 7:00 pmBWI-MDW

2h 10mnonstop

$139Southwest

Find Deal

Thu, Dec 25 - Thu, Dec 25

6:35 am - 1:55 pmMDW-BWI

6h 20m1 stop

4:45 pm - 5:50 pmBWI-MDW

2h 05mnonstop

$149Southwest

Find Deal

Tue, Nov 18 - Tue, Nov 18

7:00 am - 2:36 pmORD-DCA

6h 36m1 stop

4:55 pm - 8:52 pmDCA-ORD

4h 57m1 stop

$163JetBlue

Find Deal

Tue, Nov 18 - Wed, Nov 19

7:00 am - 2:36 pmORD-DCA

6h 36m1 stop

4:55 pm - 9:52 pmDCA-ORD

5h 57m1 stop

$169JetBlue

Find Deal

Tue, Dec 2 - Tue, Dec 9

8:13 am - 1:51 pmSTL-BWI

4h 38m1 stop

7:22 pm - 11:06 pmBWI-STL

4h 44m1 stop

$179American Airlines

Find Deal

Wed, Dec 17 - Thu, Jan 1

8:13 am - 1:48 pmSTL-BWI

4h 35m1 stop

11:45 am - 4:23 pmBWI-STL

5h 38m1 stop

$204American Airlines

Find Deal

Useful Info

Low season	September
High season	November
Cheapest flight	$41

Best time to beat the crowds with an average 13% drop in price.

Most popular time to fly with an average 2% increase in price.

Flight from St. Louis to Baltimore

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

Springfield

Hanover

Gaithersburg

Towson

Oxon Hill

Owings Mills

Glen Burnie

Ellicott City

Greenbelt

Colonial Beach

Edgewood

Pikesville

Hunt Valley

Lutherville Timonium

Stevensville

Hyattsville

Camp Springs

Capitol Heights

Westminster

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

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Cabin class types available on flights to Illinois

First Class flights to Washington, D.C.from $518

Business Class flights to Washington, D.C.from $381

Prem Econ Class flights to Washington, D.C.from $440

Economy Class flights to Washington, D.C.from $93

$41 Find Cheap Flights from Illinois to Washington, D.C.

KAYAK searches hundreds of travel sites at once for deals on flights to Washington, D.C.

Everything you should know

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.

Good to know

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

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.

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.

Flights to other popular destinations

Flights from domestic origins to Washington, D.C.

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

Find deals for your return flight