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

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

$81 CHEAP FLIGHTS from Illinois to Washington Dulles (IAD)

IAD

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Cheap Flights from Illinois to Dulles Intl

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to Dulles Intl 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.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Illinois to Dulles Intl

KAYAK's recommended round-trip deals from the most popular airlines that fly from Illinois to Dulles Intl.

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

10:50 am - 1:49 pmORD-IAD

1h 59mnonstop

8:30 am - 9:43 amIAD-ORD

2h 13mnonstop

$161United Airlines

Find Deal

Tue, Jul 1 - Wed, Jul 2

10:48 am - 4:34 pmMDW-IAD

4h 46m1 stop

3:32 pm - 11:47 pmIAD-MDW

9h 15m1 stop

$170Frontier

Find Deal

Sat, May 17 - Mon, May 19

1:08 pm - 5:37 pmMDW-IAD

3h 29m1 stop

6:00 am - 8:40 amIAD-MDW

3h 40m1 stop

$197Delta

Find Deal

Sat, May 24 - Sun, May 25

5:15 pm - 10:54 pmORD-IAD

4h 39m1 stop

6:00 am - 9:18 amIAD-ORD

4h 18m1 stop

$197Delta

Find Deal

Sat, May 24 - Sun, May 25

6:56 pm - 8:17 pmORD-IAD

24h 21m1 stop

12:40 pm - 5:09 pmIAD-ORD

5h 29m1 stop

$216

Find Deal

Thu, Jun 5 - Mon, Jun 9

9:12 am - 1:55 pmMDW-IAD

27h 43m1 stop

3:58 pm - 7:15 amIAD-MDW

16h 17m1 stop

$236Allegiant Air

Find Deal

Fri, Jun 20 - Sun, Jun 22

5:38 pm - 12:04 amORD-IAD

5h 26m1 stop

12:28 pm - 5:15 pmIAD-ORD

5h 47m1 stop

$239

Find Deal

Wed, Jun 25 - Mon, Jun 30

9:22 am - 5:11 pmORD-IAD

6h 49m1 stop

8:14 pm - 11:57 pmIAD-ORD

4h 43m1 stop

$251American Airlines

Find Deal

Sat, Jun 21 - Wed, Jun 25

6:47 pm - 12:02 amSTL-IAD

4h 15m1 stop

8:14 pm - 11:59 pmIAD-STL

4h 45m1 stop

$251American Airlines

Find Deal

Sat, May 31 - Tue, Jun 10

8:36 pm - 8:53 pmMDW-IAD

23h 17m2 stops

3:58 pm - 7:15 amIAD-MDW

16h 17m1 stop

$256Allegiant Air

Find Deal

Fri, Jun 13 - Sun, Jun 15

Useful Info

Low season	February
High season	May
Cheapest flight	$81

Best time to beat the crowds with an average 6% drop in price.

Most popular time to fly and prices are also 2% lower on average.

Flight from Chicago O'Hare 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.

Clinton

Everything you need to know for your flight to Dulles Intl

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Washington Dulles Airport (IAD)

IAD

$81 Find Cheap Flights from Illinois to Washington Dulles Airport

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

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

Good to know

FAQs for booking Illinois to Washington Dulles Airport flights

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.

Traveling to a place near Dulles Intl?

Everything you need to know for your flight to Dulles Intl

Information on your arrival and departure airports

Cabin class types available on flights to Dulles Intl

Complete your trip to Dulles Intl with a hotel stay or car rental

Find direct flights for Dulles Intl

Flights to other popular destinations

Flights from domestic origins to Illinois

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

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