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.

$120 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.

Wed, Dec 2 - Tue, Dec 8

8:15 am - 2:49 pmORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

5h 34m1 stop Atlanta Hartsfield-Jackson

12:06 pm - 10:00 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

10h 54m1 stop Atlanta Hartsfield-Jackson

$210Frontier

Sat, Dec 12 - Tue, Dec 15

10:40 am - 8:10 pmMDW Chicago Midway-IAD Washington, D.C. Dulles Intl

8h 30m1 stop Dallas/Fort Worth

8:55 pm - 9:45 amIAD Washington, D.C. Dulles Intl-MDW Chicago Midway

13h 50m1 stop Dallas/Fort Worth

$210Frontier

Wed, Feb 10 - Wed, Feb 10

8:50 am - 11:52 amORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 02mnonstop

1:39 pm - 5:29 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

4h 50m1 stop Philadelphia

$253American Airlines

Wed, Dec 16 - Fri, Jan 1

5:55 am - 12:49 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

5h 54m1 stop Newark

9:30 am - 10:54 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 24mnonstop

$260United Airlines

Tue, Dec 1 - Thu, Dec 3

5:46 pm - 2:45 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

19h 59m1 stop Boston Logan Intl

8:45 am - 4:42 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

8h 57m1 stop Boston Logan Intl

$271JetBlue

Tue, Jan 12 - Mon, Jan 25

2:55 pm - 1:56 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

22h 01m1 stop Boston Logan Intl

2:50 pm - 1:49 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

23h 59m1 stop Boston Logan Intl

$271JetBlue

Wed, Feb 24 - Sat, Feb 27

12:42 pm - 10:00 pmMDW Chicago Midway-DCA Washington, D.C. Reagan-National

8h 18m1 stop Minneapolis St Paul

6:03 am - 4:41 pmDCA Washington, D.C. Reagan-National-MDW Chicago Midway

11h 38m1 stop Minneapolis St Paul

$285Delta

Tue, Jan 26 - Sat, Jan 30

9:56 am - 10:00 pmMDW Chicago Midway-DCA Washington, D.C. Reagan-National

11h 04m1 stop Minneapolis St Paul

7:30 am - 4:53 pmDCA Washington, D.C. Reagan-National-MDW Chicago Midway

10h 23m1 stop Minneapolis St Paul

$285Delta

Tue, Dec 22 - Tue, Dec 29

9:42 am - 12:44 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 02mnonstop

3:03 pm - 4:28 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 25mnonstop

$295American Airlines

Wed, Jan 20 - Sat, Jan 23

10:30 am - 1:33 pmORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

2h 03mnonstop

8:15 am - 9:40 amIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

2h 25mnonstop

$299United Airlines

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

Thu, Nov 12 - Sat, Nov 21

7:55 am - 8:11 pmORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

11h 16m1 stop Fort Lauderdale

3:58 pm - 11:34 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

8h 36m1 stop Fort Lauderdale

$225Frontier

Sat, Nov 14 - Sat, Nov 21

7:55 am - 8:11 pmORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

11h 16m1 stop Fort Lauderdale

3:58 pm - 11:34 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

8h 36m1 stop Fort Lauderdale

$245Frontier

Tue, Nov 17 - Thu, Nov 19

9:51 am - 10:21 amORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

23h 30m1 stop Orlando

3:30 pm - 11:34 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

33h 04m2 stops Asheville Regional Fort Lauderdale

$293Multiple Airlines

Sat, Nov 14 - Mon, Nov 16

7:55 am - 8:11 pmORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

11h 16m1 stop Fort Lauderdale

6:36 pm - 5:07 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

23h 31m2 stops Blountville Tri Cities TN/VA Orlando

$335Multiple Airlines

Fri, Nov 13 - Sat, Nov 21

4:18 pm - 10:00 pmPIA Greater Peoria-DCA Washington, D.C. Reagan-National

4h 42m1 stop Charlotte Douglas

6:19 pm - 12:04 amDCA Washington, D.C. Reagan-National-PIA Greater Peoria

6h 45m1 stop Chicago O'Hare Intl

$409American Airlines

Thu, Nov 12 - Wed, Nov 18

5:13 pm - 11:46 pmMLI Moline Quad-City-DCA Washington, D.C. Reagan-National

5h 33m1 stop Atlanta Hartsfield-Jackson

6:00 am - 10:19 amDCA Washington, D.C. Reagan-National-MLI Moline Quad-City

5h 19m1 stop Atlanta Hartsfield-Jackson

$419Delta

Thu, Nov 12 - Wed, Nov 18

6:00 am - 1:54 pmMLI Moline Quad-City-IAD Washington, D.C. Dulles Intl

6h 54m1 stop Atlanta Hartsfield-Jackson

10:11 am - 4:33 pmIAD Washington, D.C. Dulles Intl-MLI Moline Quad-City

7h 22m1 stop Atlanta Hartsfield-Jackson

$419Delta

Tue, Nov 17 - Thu, Nov 19

7:00 am - 9:59 amORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

25h 59m1 stop Fort Lauderdale

6:00 am - 11:38 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

18h 38m1 stop Fort Lauderdale

$443JetBlue

Fri, Nov 13 - Sat, Nov 21

6:02 am - 12:55 pmPIA Greater Peoria-DCA Washington, D.C. Reagan-National

5h 53m1 stop Chicago O'Hare Intl

12:50 pm - 5:07 pmDCA Washington, D.C. Reagan-National-PIA Greater Peoria

5h 17m1 stop Chicago O'Hare Intl

$445American Airlines

Tue, Nov 17 - Thu, Nov 19

1:00 pm - 8:09 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

6h 09m1 stop Boston Logan Intl

9:15 am - 4:40 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

8h 25m1 stop Boston Logan Intl

$491JetBlue

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

Tue, Dec 22 - Tue, Dec 29

9:42 am - 12:44 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 02mnonstop

3:03 pm - 4:28 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 25mnonstop

$295American Airlines

Sat, Dec 12 - Wed, Dec 16

6:06 am - 9:14 amORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 08mnonstop

6:25 pm - 7:56 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 31mnonstop

$296American Airlines

Tue, Dec 22 - Tue, Dec 29

7:49 am - 10:50 amORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 01mnonstop

6:58 am - 8:20 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 22mnonstop

$297American Airlines

Sat, Jan 23 - Wed, Jan 27

12:55 pm - 3:55 pmMDW Chicago Midway-DCA Washington, D.C. Reagan-National

2h 00mnonstop

6:10 am - 7:20 amDCA Washington, D.C. Reagan-National-MDW Chicago Midway

2h 10mnonstop

$299Southwest

Wed, Dec 9 - Sat, Dec 12

1:30 pm - 4:15 pmMDW Chicago Midway-DCA Washington, D.C. Reagan-National

1h 45mnonstop

9:25 am - 10:30 amDCA Washington, D.C. Reagan-National-MDW Chicago Midway

2h 05mnonstop

$299Southwest

Wed, Jan 20 - Sat, Jan 23

10:30 am - 1:33 pmORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

2h 03mnonstop

8:15 am - 9:40 amIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

2h 25mnonstop

$299United Airlines

Wed, Dec 9 - Sat, Dec 12

8:52 am - 11:53 amORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

2h 01mnonstop

8:15 am - 9:37 amIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

2h 22mnonstop

$299United Airlines

Tue, Dec 22 - Tue, Dec 29

8:55 pm - 11:40 pmMDW Chicago Midway-DCA Washington, D.C. Reagan-National

1h 45mnonstop

6:10 am - 7:15 amDCA Washington, D.C. Reagan-National-MDW Chicago Midway

2h 05mnonstop

$299Southwest

Wed, Dec 2 - Sat, Dec 5

1:30 pm - 4:33 pmORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

2h 03mnonstop

1:05 pm - 2:28 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

2h 23mnonstop

$299United Airlines

Sat, Nov 28 - Sun, Nov 29

5:35 am - 8:25 amMDW Chicago Midway-DCA Washington, D.C. Reagan-National

1h 50mnonstop

8:05 am - 9:10 amDCA Washington, D.C. Reagan-National-MDW Chicago Midway

2h 05mnonstop

$554JetBlue

Useful Info

Low season	February
High season	November
Cheapest flight	$120

Best time to beat the crowds with an average 22% drop in price.

Most popular time to fly and prices are also 6% lower on average.

Flight from Chicago O'Hare Airport to Washington Dulles Airport

IndivarFlew with American Airlines-Aug 2026

For a work trips, consider booking an Airline with multiple daily flights in case you might want standby for an earlier return flight.

UzomaFlew with American Airlines-Jan 2024

ORD and DCA are nice airports with plenty of space. ORD is always busy so allow ample time to drive there, drop your bag, and go through security if you don't have TSA pre check.

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

Owings Mills

Oxon Hill

Greenbelt

Glen Burnie

Edgewood

Camp Springs

Chesapeake Beach

Ellicott City

Pikesville

Hunt Valley

Capitol Heights

Lutherville Timonium

Colonial Beach

Clinton

Westminster

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$120 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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Flights from Illinois to Washington, D.C.: the best tips from KAYAK users

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

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