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>

$57 Cheap Flights from Illinois to Washington, D.C.

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

...and more

Travelers love KAYAK

41 299 237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheapest round-trip

$88

Typical prices: $169-$290

Frontier

Thu 1/15Mon 1/19

ORD - BWI • Non-stop

Cheapest one-way

$57

Typical prices: $202-$410

Frontier

Tue 1/27

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, Jan 15 - Mon, Jan 19

7:35 am - 10:35 am

ORD

BWI

2h 00mnonstop

1:54 pm - 3:21 pm

BWI

ORD

2h 27mnonstop

$88Frontier

Thu, Feb 19 - Sun, Feb 22

5:01 am - 8:03 am

ORD

BWI

2h 02mnonstop

8:58 am - 10:22 am

BWI

ORD

2h 24mnonstop

$90Frontier

Fri, Jan 23 - Fri, Jan 30

6:05 am - 9:05 am

ORD

BWI

2h 00mnonstop

10:00 am - 11:27 am

BWI

ORD

2h 27mnonstop

$91Frontier

Tue, Jan 13 - Thu, Jan 15

10:48 am - 11:47 pm

ORD

BWI

11h 59m1 stop

1:54 pm - 3:21 pm

BWI

ORD

2h 27mnonstop

$94Multiple Airlines

Thu, Jan 8 - Mon, Jan 12

4:20 pm - 7:22 pm

ORD

BWI

2h 02mnonstop

11:30 am - 7:41 pm

BWI

ORD

9h 11m1 stop

$95Multiple Airlines

Thu, Jan 8 - Mon, Jan 12

5:15 pm - 8:10 pm

MDW

BWI

1h 55mnonstop

10:25 am - 11:35 am

BWI

MDW

2h 10mnonstop

$139Southwest

Thu, Dec 25 - Thu, Jan 1

12:55 pm - 3:40 pm

MDW

BWI

1h 45mnonstop

11:20 am - 2:05 pm

BWI

MDW

3h 45m1 stop

$145Southwest

Thu, Jan 1 - Sat, Jan 10

6:02 am - 9:10 am

STL

DCA

2h 08mnonstop

7:40 am - 9:24 am

DCA

STL

2h 44mnonstop

$231American Airlines

Thu, Jan 1 - Sat, Jan 10

8:15 am - 11:24 am

STL

IAD

2h 09mnonstop

8:40 am - 10:13 am

IAD

STL

2h 33mnonstop

$231United Airlines

Tue, Jan 6 - Tue, Jan 13

1:12 pm - 4:23 pm

STL

IAD

2h 11mnonstop

8:40 am - 10:13 am

IAD

STL

2h 33mnonstop

$235United Airlines

Useful Info

Low season	September
High season	March
Cheapest flight	$57

Best time to beat the crowds with an average 16% drop in price.

Most popular time to fly with an average 22% 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

Hanover

Springfield

Gaithersburg

Towson

Oxon Hill

Owings Mills

Glen Burnie

Greenbelt

Ellicott City

Edgewood

Colonial Beach

Pikesville

Hunt Valley

Lutherville Timonium

Camp Springs

Stevensville

Hyattsville

Westminster

Capitol Heights

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 $511

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

Prem Econ Class flights to Washington, D.C.from $451

Economy Class flights to Washington, D.C.from $58

$57 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