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O'Hare Intl

$99+ Cheap flights from Dulles Intl (IAD) to O'Hare Intl (ORD)

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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — ORD
Aug 10 — Aug 171
Mon 8/10
Mon 8/17
1 adult, Economy
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Find cheap flights from Dulles Intl to O'Hare Intl with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Chicago O'Hare Intl are usually found in September or August, booked 86 days in advance, depart on a Thursday or Friday and return on a Friday

Cheap flight deals from Dulles Intl to O'Hare Intl

Cheapest flights from Dulles Intl to O'Hare Intl
Explore the most affordable flight options available from Dulles Intl to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 11, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/8. 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 8/1011:10 am
IAD
-
ORD
2 stops9h 43m
Frontier
Thu 8/137:05 am
ORD
-
IAD
1 stop8h 35m
Frontier
Deal found 7/8$240
This Kiwi.com deal was found by Cheapflights users on 7/8. 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 8/1011:10 am
IAD
-
ORD
2 stops9h 43m
Frontier
Wed 8/121:50 pm
ORD
-
IAD
1 stop8h 02m
Frontier
Deal found 7/8$241
This Kiwi.com deal was found by Cheapflights users on 7/8. 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 7/288:33 pm
IAD
-
ORD
1 stop12h 20m
Frontier
Thu 8/61:50 pm
ORD
-
IAD
1 stop8h 02m
Frontier
Deal found 7/8$242
This Kiwi.com deal was found by Cheapflights users on 7/8. 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.
Sun 8/161:32 pm
IAD
-
ORD
1 stop10h 38m
Frontier
Mon 8/171:50 pm
ORD
-
IAD
1 stop8h 02m
Frontier
Deal found 7/8$243
This CheapOair deal was found by Cheapflights users on 7/9. 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.
Sat 9/268:00 pm
IAD
-
ORD
1 stop13h 21m
Frontier
Tue 9/292:03 pm
ORD
-
IAD
1 stop9h 25m
Frontier
Deal found 7/9$244
This Kiwi.com deal was found by Cheapflights users on 7/9. 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 8/712:00 pm
IAD
-
ORD
2 stops12h 10m
Multiple Airlines
Mon 8/107:05 am
ORD
-
IAD
1 stop9h 09m
Multiple Airlines
Deal found 7/9$245
This Kiwi.com deal was found by Cheapflights users on 7/8. 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 8/712:00 pm
IAD
-
ORD
2 stops12h 10m
Multiple Airlines
Tue 8/116:19 am
ORD
-
IAD
1 stop9h 21m
Multiple Airlines
Deal found 7/8$246
This Kiwi.com deal was found by Cheapflights users on 7/8. 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 8/1411:10 am
IAD
-
ORD
2 stops9h 43m
Frontier
Wed 8/191:59 pm
ORD
-
IAD
1 stop7h 53m
Frontier
Deal found 7/8$247
This Kiwi.com deal was found by Cheapflights users on 7/10. 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.
Sun 8/98:33 pm
IAD
-
ORD
1 stop12h 29m
Frontier
Sun 8/167:05 am
ORD
-
IAD
2 stops27h 38m
Frontier
Deal found 7/10$248
This Frontier deal was found by Cheapflights users on 7/7. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/288:33 pm
IAD
-
ORD
1 stop12h 20m
Frontier
Thu 7/308:05 am
ORD
-
IAD
1 stop10h 33m
Frontier
Deal found 7/7$249
This Expedia deal was found by Cheapflights users on 7/7. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2211:11 am
IAD
-
ORD
1 stop12h 59m
Frontier
Tue 7/287:05 am
ORD
-
IAD
1 stop8h 35m
Frontier
Deal found 7/7$250

Find flight deals from Dulles Intl to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to O'Hare Intl (ORD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$240
(Kiwi.com)

One-way from

$99
(Delta)

Popular in

March

Cheapest in

September

Average price

$372

Good round-trip deal

$377 or less

Good one-way deal

$246 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Chicago O'Hare Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Chicago O'Hare Intl flights.
Search Deals
From Washington, D.C. Dulles Intl to Chicago O'Hare Intl
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Chicago O'Hare Intl
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($56 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Chicago O'Hare Intl.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Chicago O'Hare Intl.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to O'Hare 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 July 11, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Tue 8/25

10:27 pm-11:40 pm

Nonstop2h 13m

Chicago O'Hare Intl

Fri 8/28

10:50 am-1:55 pm

Nonstop2h 05m

$291

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Sun 8/2

7:26 pm-11:53 pm

1 stop5h 27m

Chicago O'Hare Intl

Tue 8/4

5:30 am-11:33 am

1 stop5h 03m

$297
Quickest round-trip

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Wed 8/5

6:10 am-7:27 am

Nonstop2h 17m

Chicago O'Hare Intl

Fri 8/7

6:30 am-9:24 am

Nonstop1h 54m

$303

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Thu 10/8

10:18 pm-11:32 pm

Nonstop2h 14m

Chicago O'Hare Intl

Sun 10/11

4:35 pm-11:49 am

1 stop18h 14m

$324

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Thu 7/30

12:49 pm-3:19 pm

1 stop3h 30m

Chicago O'Hare Intl

Tue 8/4

9:40 pm-12:45 am

Nonstop2h 05m

$324

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Wed 7/22

5:26 pm-8:31 pm

1 stop4h 05m

Chicago O'Hare Intl

Thu 8/6

5:20 pm-11:26 pm

1 stop5h 06m

$332

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Sat 8/8

12:49 pm-3:19 pm

1 stop3h 30m

Chicago O'Hare Intl

Mon 8/10

8:40 am-11:52 am

Nonstop2h 12m

$353

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Sat 8/22

12:40 pm-3:14 pm

1 stop3h 34m

Chicago O'Hare Intl

Mon 8/24

6:25 am-9:23 am

Nonstop1h 58m

$380

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Sat 8/22

12:40 pm-3:14 pm

1 stop3h 34m

Chicago O'Hare Intl

Sun 8/23

10:50 am-1:55 pm

Nonstop2h 05m

$384

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Tue 8/4

12:49 pm-3:19 pm

1 stop3h 30m

Chicago O'Hare Intl

Sun 8/9

8:40 am-11:52 am

Nonstop2h 12m

$395

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/8

Showing 1-10 of 21 resultsSorted by cheapest first
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3

Compare providers for flights from Dulles Intl to O'Hare Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to O'Hare Intl in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars
MytripPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Chicago O'Hare Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Chicago O'Hare Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Chicago O'Hare Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Chicago O'Hare Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-Chicago O'Hare Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Dulles Intl to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport?

The price you pay for your flight from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 85 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport?

Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport (average of $302). Flying from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $488). 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 IAD to ORD?

Find hourly flight availability from Dulles Intl to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 11, 2026.

It’s optimal to fly from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport in the evening. By choosing this option you can save up to 13% on the cost of your flight, compared to a flight in the afternoon.

What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to O'Hare Intl. Price data was last updated on July 4, 2026.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport flight should consider departing on Thursday evenings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport?

The best insider tips for Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport trip
Our travel experts
Ramsey Qubein

Ramsey Qubein

Expert on ORD and IAD

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to O'Hare Intl. Reviews last updated July 11, 2026.
Peruse reviews from past customers who have flown with United Airlines and Frontier from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,978 reviews

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.7

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
9,978 reviews
United Airlines
7.4
Good
9,978 reviews

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.7

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
Frontier
5.6
Fair
2,829 reviews
United Airlines
7.4
Good
9,978 reviews

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.7

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to O'Hare 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 Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport?

    A quick flight from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport can take about 2h 13m. United Airlines provides one of the quickest options available for as low as $291. Washington, D.C. Dulles Intl Airport and Chicago O'Hare Intl Airport are separated by a distance of 587 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport round-trip?

    Frontier, at $98, was found to be the cheapest airline from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport. An alternate airline flying to your destination would be United Airlines. Frontier is 75% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport?

    Consider Egyptair (92%), Air China (91%) or ANA (80%) when booking your flight. These represent the most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport.

  • What are the cheapest flights from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport?

    While on average a flight from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport is generally $835, our data shows the cheapest flight currently is $140. When looking at the most popular route, (Washington, D.C. Dulles Intl - Chicago O'Hare Intl), you can expect to pay $181 for that flight.

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

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

  • How can I find direct flights from Dulles Intl to O'Hare Intl?

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

  • Can I find deals for business class flights from Dulles Intl to O'Hare Intl?

    Yes. Cheapflights offers flight deals from Dulles Intl to O'Hare 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 Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport?

    Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport (average of $302). Flying from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $488). 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 Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Benton Harbor
Rosemont
Schaumburg
Lake Geneva
Naperville
Oak Brook
Gurnee
Delavan
Oakbrook Terrace
South Holland
Libertyville
Hoffman Estates
Downers Grove
Rockford
Racine
Great Lakes
Joliet
Orland Park
Northbrook
Waukegan

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Alternative routes for Dulles Intl to O'Hare Intl

See prices for flight routes from nearby airports that may be better suited for you.
Baltimore to O'Hare Intl flights
Reagan-National to O'Hare Intl flights
Dulles Intl to Midway flights
Baltimore to Midway flights
Reagan-National to Midway flights

Top 2 airlines flying from Dulles Intl to O'Hare Intl

Discover the top 2 airlines that operate flights from Dulles Intl to O'Hare 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 July 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$98Average$209FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$228Average$402FlexibilityNo cancel feeOn-time69%

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