How does KAYAK find such low prices on flights from Illinois to Washington Dulles Airport?

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 Dulles Airport.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Washington Dulles Airport?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport 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 Dulles Airport?

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 Dulles Airport 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 Dulles Airport?

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 Dulles Airport from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$118 CHEAP FLIGHTS from Illinois to Washington Dulles (IAD)

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Flight Deals

Cheap Flights from Illinois to Dulles Intl

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 Dulles Intl

Wed, Dec 16 - Sun, Jan 17

8:30 am - 2:49 pmORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

5h 19m1 stop Atlanta Hartsfield-Jackson

6:37 am - 11:50 amIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

6h 13m1 stop Atlanta Hartsfield-Jackson

$196Frontier

Thu, Dec 3 - Sun, Dec 6

8:17 am - 2:49 pmORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

5h 32m1 stop Atlanta Hartsfield-Jackson

10:35 pm - 7:20 amIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

9h 45m1 stop Atlanta Hartsfield-Jackson

$196Frontier

Wed, Nov 18 - Sat, Dec 5

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

23h 30m1 stop Orlando

10:35 pm - 7:20 amIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

9h 45m1 stop Atlanta Hartsfield-Jackson

$196Frontier

Fri, Dec 11 - Sun, Dec 13

10:37 pm - 2:49 pmORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

15h 12m1 stop Atlanta Hartsfield-Jackson

10:35 pm - 7:20 amIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

9h 45m1 stop Atlanta Hartsfield-Jackson

$196Frontier

Wed, Nov 18 - Thu, Nov 19

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

23h 30m1 stop Orlando

12:43 pm - 6:30 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

6h 47m1 stop Minneapolis St Paul

$238Multiple Airlines

Tue, Dec 8 - Sat, Dec 12

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

2h 01mnonstop

10:15 pm - 11:29 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

2h 14mnonstop

$259United Airlines

Thu, Dec 10 - Mon, Dec 14

6:15 pm - 9:18 pmORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

2h 03mnonstop

3:37 pm - 5:00 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

2h 23mnonstop

$259United Airlines

Wed, Nov 25 - Tue, Dec 1

5:55 am - 8:49 amORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

1h 54mnonstop

5:40 pm - 7:05 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

2h 25mnonstop

$259United Airlines

Sun, Nov 15 - Thu, Nov 19

7:55 am - 5:12 pmORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

32h 17m2 stops Fort Lauderdale Atlanta Hartsfield-Jackson

12:43 pm - 6:30 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

6h 47m1 stop Minneapolis St Paul

$265Multiple Airlines

Wed, Nov 18 - Wed, Dec 2

1:32 pm - 10:21 amPIA Greater Peoria-IAD Washington, D.C. Dulles Intl

19h 49m1 stop Orlando Sanford Intl

12:06 pm - 8:03 amIAD Washington, D.C. Dulles Intl-PIA Greater Peoria

20h 57m2 stops Atlanta Hartsfield-Jackson Tampa

$273Multiple Airlines

Recent last minute flight deals from Illinois to Dulles Intl

Thu, Nov 5 - Fri, Nov 6

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

11h 16m1 stop Fort Lauderdale

6:07 pm - 3:37 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

22h 30m1 stop Fort Lauderdale

$221Frontier

Tue, Nov 3 - Fri, Nov 6

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

23h 30m1 stop Orlando

6:07 pm - 3:37 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

22h 30m1 stop Fort Lauderdale

$234Frontier

Wed, Nov 4 - Fri, Nov 6

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

23h 30m1 stop Orlando

6:07 pm - 3:37 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

22h 30m1 stop Fort Lauderdale

$242Frontier

Thu, Nov 5 - Fri, Nov 6

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

11h 16m1 stop Fort Lauderdale

6:07 pm - 3:37 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

22h 30m1 stop Fort Lauderdale

$243Frontier

Wed, Nov 4 - Mon, Nov 23

10:43 am - 5:24 pmPIA Greater Peoria-IAD Washington, D.C. Dulles Intl

5h 41m1 stop Chicago O'Hare Intl

5:30 pm - 9:13 pmIAD Washington, D.C. Dulles Intl-PIA Greater Peoria

4h 43m1 stop Chicago O'Hare Intl

$372United Airlines

Tue, Nov 3 - Wed, Nov 11

6:00 am - 2:09 pmMLI Moline Quad-City-IAD Washington, D.C. Dulles Intl

7h 09m1 stop Atlanta Hartsfield-Jackson

6:00 am - 10:19 amIAD Washington, D.C. Dulles Intl-MLI Moline Quad-City

5h 19m1 stop Atlanta Hartsfield-Jackson

$373Delta

Wed, Nov 4 - Thu, Dec 3

5:27 am - 2:09 pmORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

7h 42m1 stop Atlanta Hartsfield-Jackson

7:39 pm - 11:56 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

5h 17m1 stop Atlanta Hartsfield-Jackson

$390Delta

Mon, Nov 2 - Thu, Dec 3

4:45 pm - 10:59 pmORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

5h 14m1 stop Charlotte Douglas

8:03 pm - 11:59 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

4h 56m1 stop Charlotte Douglas

$390American Airlines

Thu, Nov 5 - Sun, Nov 8

8:13 am - 1:35 pmMLI Moline Quad-City-IAD Washington, D.C. Dulles Intl

4h 22m1 stop Chicago O'Hare Intl

6:10 am - 10:05 amIAD Washington, D.C. Dulles Intl-MLI Moline Quad-City

4h 55m1 stop Chicago O'Hare Intl

$441United Airlines

Thu, Nov 5 - Sun, Nov 8

10:40 am - 4:33 pmMLI Moline Quad-City-IAD Washington, D.C. Dulles Intl

4h 53m1 stop Chicago O'Hare Intl

5:29 pm - 10:59 pmIAD Washington, D.C. Dulles Intl-MLI Moline Quad-City

6h 30m1 stop Chicago O'Hare Intl

$441United Airlines

Recent direct flight deals from Illinois to Dulles Intl

Tue, Dec 8 - Sat, Dec 12

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

2h 01mnonstop

10:15 pm - 11:29 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

2h 14mnonstop

$259United Airlines

Thu, Dec 10 - Mon, Dec 14

6:15 pm - 9:18 pmORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

2h 03mnonstop

3:37 pm - 5:00 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

2h 23mnonstop

$259United Airlines

Wed, Nov 25 - Tue, Dec 1

5:55 am - 8:49 amORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

1h 54mnonstop

5:40 pm - 7:05 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

2h 25mnonstop

$259United Airlines

Mon, Dec 7 - Tue, Dec 8

9:35 pm - 12:24 amORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

1h 49mnonstop

10:10 am - 11:33 amIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

2h 23mnonstop

$259United Airlines

Thu, Dec 3 - Mon, Dec 7

9:35 pm - 12:24 amORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

1h 49mnonstop

10:10 am - 11:33 amIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

2h 23mnonstop

$259United Airlines

Sat, Dec 12 - Mon, Dec 14

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

2h 01mnonstop

3:37 pm - 5:00 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

2h 23mnonstop

$259United Airlines

Tue, Dec 8 - Sat, Dec 12

10:35 am - 1:38 pmORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

2h 03mnonstop

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

2h 22mnonstop

$259United Airlines

Mon, Dec 7 - Thu, Dec 10

10:35 am - 1:38 pmORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

2h 03mnonstop

10:15 pm - 11:29 pmIAD Washington, D.C. Dulles Intl-ORD Chicago O'Hare Intl

2h 14mnonstop

$259United Airlines

Mon, Nov 23 - Tue, Dec 1

5:55 am - 8:49 amORD Chicago O'Hare Intl-IAD Washington, D.C. Dulles Intl

1h 54mnonstop

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

2h 22mnonstop

$259United Airlines

Useful Info

Low season	January
High season	December
Cheapest flight	$118

Best time to beat the crowds with an average 8% drop in price.

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

Flight from Chicago Midway Airport to Washington Dulles Airport

How does KAYAK find such low prices on flights from Illinois to Washington Dulles Airport?
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 Dulles Airport.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Washington Dulles Airport?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport 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 Dulles Airport?
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 Dulles Airport 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 Dulles Airport?
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 Dulles Airport from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Winchester

Linthicum Heights

Hanover

Springfield

Gaithersburg

Towson

Martinsburg

Owings Mills

Oxon Hill

Charles Town

Greenbelt

Glen Burnie

Edgewood

Camp Springs

Chesapeake Beach

Ellicott City

Pikesville

Hunt Valley

Capitol Heights

Lutherville Timonium

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IAD

$118 Find Cheap Flights from Illinois to Washington Dulles Airport - Compare and Save

Cheap Flights from Illinois to Dulles Intl

Recent round-trip flight deals from Illinois to Dulles Intl

Recent one-way flight deals from Illinois to Dulles Intl

Recent last minute flight deals from Illinois to Dulles Intl

Recent direct flight deals from Illinois to Dulles Intl

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FAQs for booking Illinois to Washington Dulles Airport flights

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