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Dulles Intl

$55+ Cheap flights from Illinois to Dulles Intl (IAD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — IAD
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Illinois to Dulles Intl

Keep the following information in mind while searching for Illinois to Dulles Intl flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$150
(Priceline)

One-way from

$55
(Priceline)

Popular in

January

Cheapest in

August

Average price

$257

Good round-trip deal

$334 or less

Good one-way deal

$158 or less
Provider with most accurate pricing for Chicago (CHI)-Washington, D.C. (WAS) flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Washington, D.C. (WAS) flights.
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From Illinois to Washington, D.C. Dulles Intl
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One-way flight from Illinois to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 5% potential increase in price ($11 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Illinois to Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from Illinois to Washington, D.C. Dulles Intl.
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Find flight deals from Illinois to Dulles Intl

Cheapest flights from Illinois to Dulles Intl
Explore the most affordable flight options available from Illinois to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:14 amMDW - IAD
1 stop9h 23mFrontier
Tue 12/305:37 pmIAD - MDW
1 stop5h 35mFrontier
Deal found 10/28$146
This Kiwi.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/186:12 amMDW - IAD
1 stop11h 04mFrontier
Tue 12/235:37 pmIAD - MDW
1 stop5h 35mFrontier
Deal found 10/28$147
This Mytrip deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/111:56 pmMDW - IAD
1 stop5h 24mFrontier
Sat 11/158:36 pmIAD - MDW
1 stop13h 36mFrontier
Deal found 10/30$150
This CheapOair deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1112:37 pmORD - IAD
1 stop6h 43mFrontier
Thu 11/136:00 amIAD - ORD
1 stop5h 41mFrontier
Deal found 10/30$150
This Kiwi.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/156:00 amORD - IAD
1 stop16h 55mFrontier
Thu 11/276:41 pmIAD - ORD
1 stop6h 27mFrontier
Deal found 10/28$151
This Kiwi.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1812:37 pmORD - IAD
1 stop6h 43mFrontier
Mon 12/85:45 amIAD - ORD
1 stop17h 39mFrontier
Deal found 10/28$153
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/276:05 amMDW - IAD
1 stop10h 41mFrontier
Thu 12/47:18 pmIAD - MDW
1 stop27h 54mFrontier
Deal found 10/30$154
This Kiwi.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/171:50 pmORD - IAD
2 stops9h 21mFrontier
Wed 12/109:00 amIAD - ORD
1 stop6h 31mFrontier
Deal found 10/28$154
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/54:20 pmORD - IAD
1 stop5h 45mFrontier
Sun 12/75:26 pmIAD - ORD
1 stop5h 58mFrontier
Deal found 10/29$155
This Kiwi.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:12 amMDW - IAD
1 stop11h 04mFrontier
Tue 12/305:37 pmIAD - MDW
1 stop5h 35mFrontier
Deal found 10/28$156
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/181:56 pmMDW - IAD
1 stop5h 24mFrontier
Thu 12/117:18 pmIAD - MDW
1 stop25h 24mFrontier
Deal found 10/27$157
This Kiwi.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/158:00 amORD - IAD
1 stop10h 51mFrontier
Thu 12/115:45 amIAD - ORD
1 stop12h 42mFrontier
Deal found 10/28$158

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Dulles Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
Use the filters below to find and compare flights from Illinois to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Illinois

Fly to

Dulles Intl

Route

Depart

Return

Price

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Thu 11/6

1:37 pm-12:11 am

1 stop9h 34m

Washington, D.C. Dulles Intl

Mon 11/10

5:44 pm-10:11 pm

1 stop5h 27m

$176

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Thu 11/6

6:25 am-4:34 pm

1 stop9h 09m

Washington, D.C. Dulles Intl

Fri 11/7

5:34 pm-10:08 pm

1 stop5h 34m

$236

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Thu 12/18

9:15 pm-12:15 am

Nonstop2h 00m

Washington, D.C. Dulles Intl

Tue 12/23

10:33 pm-11:44 pm

Nonstop2h 11m

$237

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Thu 12/4

9:05 pm-11:55 pm

Nonstop1h 50m

Washington, D.C. Dulles Intl

Sat 12/6

10:35 pm-11:43 pm

Nonstop2h 08m

$237

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Thu 11/27

2:06 pm-4:58 pm

Nonstop1h 52m

Washington, D.C. Dulles Intl

Thu 12/4

1:10 pm-2:25 pm

Nonstop2h 15m

$238

PeoriaWashington, D.C.

PIA - IAD

PIAIAD

Greater Peoria

Wed 4/1

10:55 am-4:01 pm

1 stop4h 06m

Washington, D.C. Dulles Intl

Tue 4/7

5:15 pm-8:46 pm

1 stop4h 31m

$249

PeoriaWashington, D.C.

PIA - IAD

PIAIAD

Greater Peoria

Thu 11/27

10:51 am-3:55 pm

1 stop4h 04m

Washington, D.C. Dulles Intl

Thu 12/4

8:20 am-11:59 am

1 stop4h 39m

$249

PeoriaWashington, D.C.

PIA - IAD

PIAIAD

Greater Peoria

Thu 12/11

5:15 pm-11:55 pm

1 stop5h 40m

Washington, D.C. Dulles Intl

Mon 12/15

8:20 am-2:03 pm

1 stop6h 43m

$249

PeoriaWashington, D.C.

PIA - IAD

PIAIAD

Greater Peoria

Wed 11/26

10:51 am-5:30 pm

1 stop5h 39m

Washington, D.C. Dulles Intl

Tue 12/2

6:30 am-10:09 am

1 stop4h 39m

$249

MolineWashington, D.C.

MLI - IAD

MLIIAD

Moline Quad-City

Thu 11/20

3:55 pm-9:23 pm

1 stop4h 28m

Washington, D.C. Dulles Intl

Sun 11/23

8:30 am-11:50 am

1 stop4h 20m

$249

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Washington, D.C. Dulles Intl Airport

What is the cheapest month to book a flight from Illinois to Washington, D.C. Dulles Intl Airport?

Currently, September is the cheapest month in which you can book a flight from Illinois to Washington, D.C. Dulles Intl Airport (average of $144). Flying from Illinois to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of $229). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to IAD?

Find hourly flight availability from Illinois to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

It’s optimal to fly from Illinois to Washington, D.C. Dulles Intl Airport in the morning. By choosing this option you can save up to 32% on the cost of your flight, compared to a flight at noon.

What is the cheapest day to fly from Illinois to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Dulles Intl. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Illinois to Washington, D.C. Dulles Intl Airport flight should consider departing on Saturday afternoons when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Illinois to Washington, D.C. Dulles Intl Airport?

    Frontier, United Airlines, and Delta can get you from Illinois to Washington, D.C. Dulles Intl Airport in just under 2h. Your travel time can differ by up to 7h 34m. Illinois and Washington, D.C. Dulles Intl Airport are separated by a distance of 587 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from Illinois to Washington, D.C. Dulles Intl Airport?

    The most popular flight routes from Illinois to Washington, D.C. Dulles Intl Airport are Chicago O'Hare Intl - Washington, D.C. Dulles Intl, Chicago Midway - Washington, D.C. Dulles Intl and Lambert-St Louis - Washington, D.C. Dulles Intl.

  • What are the most reliable airlines from Illinois to Washington, D.C. Dulles Intl Airport?

    The top 3 most reliable airlines when flying from Illinois to Washington, D.C. Dulles Intl Airport are Egyptair (100%), Air China (100%) and ITA Airways (97%).

  • What are the cheapest flights from Illinois to Washington, D.C. Dulles Intl Airport?

    The cheapest flight price from Illinois to Washington, D.C. Dulles Intl Airport is $118. On average you can expect to pay $872. The most popular route, (Chicago O'Hare Intl - Washington, D.C. Dulles Intl), can usually be booked for $130.

  • Can I find deals for flights from Illinois to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Illinois to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Dulles Intl.

  • Can I find deals for business class flights from Illinois to Dulles Intl?

    Yes. Cheapflights offers flight deals from Illinois to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Washington, D.C. Dulles Intl Airport?

    Currently, September is the cheapest month in which you can book a flight from Illinois to Washington, D.C. Dulles Intl Airport (average of $144). Flying from Illinois to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of $229). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Springfield
Hanover
Silver Spring
Fairfax
Fredericksburg
Falls Church
Owings Mills
Linthicum Heights
Manassas
Largo
Oxon Hill
Laurel
Towson
National Harbor
Waldorf
Bowie

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Alternative routes for Illinois to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
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Dallas/Fort Worth to Dulles Intl flights
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Los Angeles to Reagan-National flights
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O'Hare Intl to Dulles Intl flights
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O'Hare Intl to Baltimore flights
Boston to Reagan-National flights
O'Hare Intl to Reagan-National flights
Los Angeles to Baltimore flights
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George Bush Intcntl to Reagan-National flights
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Denver to Baltimore flights
Minneapolis to Dulles Intl flights
Minneapolis to Baltimore flights
Denver to Reagan-National flights
Tampa to Reagan-National flights
John F Kennedy Intl to Reagan-National flights
Tampa to Baltimore flights
Fort Lauderdale to Dulles Intl flights
Miami to Dulles Intl flights
Minneapolis to Reagan-National flights

Top 4 airlines flying from Illinois to Dulles Intl

Discover the top 4 airlines that operate flights from Illinois to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$100Average$240FlexibilityNo cancel feeOn-time62%
DeltaCheapest$186Average$321FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$193Average$366FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$258Average$418FlexibilityNo cancel feeOn-time71%

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