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O'Hare Intl

$78+ 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 10/24. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — ORD
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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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 October, booked 83 days in advance, depart on a Friday or Thursday and return on a Friday

Cheap 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 September 11, 2025.

Round-trip from

$142
(Gotogate)

One-way from

$78
(Booking.com)

Popular in

February

Cheapest in

September

Average price

$284

Good round-trip deal

$307 or less

Good one-way deal

$211 or less
From Washington, D.C. Dulles Intl to Chicago O'Hare Intl
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One-way flight from Washington, D.C. Dulles Intl to Chicago O'Hare Intl
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Highest demand for flights based on searches. 6% potential increase in price ($23 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Chicago O'Hare Intl.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Chicago O'Hare Intl.
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Find 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 September 11, 2025.

This Gotogate deal was found by Cheapflights users on 9/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/21:55 pmIAD - ORD
1 stop10h 44mFrontier
Mon 10/610:42 amORD - IAD
1 stop11h 34mFrontier
Deal found 9/11$142
This Mytrip deal was found by Cheapflights users on 9/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/179:15 amIAD - ORD
1 stop9h 24mFrontier
Fri 9/198:49 pmORD - IAD
1 stop20h 35mFrontier
Deal found 9/10$144
This Booking.com deal was found by Cheapflights users on 9/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/287:14 pmIAD - ORD
1 stop25h 30mFrontier
Wed 10/111:45 amORD - IAD
1 stop7h 10mFrontier
Deal found 9/10$145
This Booking.com deal was found by Cheapflights users on 9/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/207:00 amIAD - ORD
1 stop10h 45mFrontier
Tue 9/2311:45 amORD - IAD
1 stop7h 10mFrontier
Deal found 9/10$146
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/310:10 pmIAD - ORD
Nonstop2h 05mUnited Airlines
Sun 10/58:45 amORD - IAD
Nonstop2h 05mUnited Airlines
Deal found 9/10$149
This Booking.com deal was found by Cheapflights users on 9/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/28:36 pmIAD - ORD
1 stop16h 40mFrontier
Tue 11/1112:37 pmORD - IAD
1 stop6h 43mFrontier
Deal found 9/11$150
This Booking.com deal was found by Cheapflights users on 9/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/181:55 pmIAD - ORD
1 stop11h 15mFrontier
Sat 9/205:40 pmORD - IAD
1 stop5h 15mFrontier
Deal found 9/11$151
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Tue 10/79:00 amIAD - ORD
1 stop5h 47mFrontier
Tue 10/1411:00 amORD - IAD
1 stop7h 46mFrontier
Deal found 9/9$152
This Frontier deal was found by Cheapflights users on 9/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/249:15 amIAD - ORD
1 stop9h 24mFrontier
Thu 9/255:10 amORD - IAD
1 stop6h 45mFrontier
Deal found 9/10$153
This Frontier deal was found by Cheapflights users on 9/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/201:02 pmIAD - ORD
1 stop11h 56mFrontier
Mon 9/225:10 amORD - IAD
1 stop6h 45mFrontier
Deal found 9/10$154
This Booking.com deal was found by Cheapflights users on 9/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/75:34 pmIAD - ORD
1 stop7h 37mFrontier
Sun 11/167:05 amORD - IAD
1 stop14h 04mFrontier
Deal found 9/10$156

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 September 11, 2025.
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

Dulles Intl

Fly to

O'Hare Intl

Route

Depart

Return

Price

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Fri 11/7

10:35 pm-11:43 pm

Nonstop2h 08m

Chicago O'Hare Intl

Sun 11/16

8:50 am-11:49 am

Nonstop1h 59m

$149

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Fri 10/31

10:35 pm-11:43 pm

Nonstop2h 08m

Chicago O'Hare Intl

Sun 11/2

8:50 am-11:49 am

Nonstop1h 59m

$149

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Mon 10/13

10:10 pm-11:15 pm

Nonstop2h 05m

Chicago O'Hare Intl

Sat 10/18

10:45 am-1:51 pm

Nonstop2h 06m

$179

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Sat 10/4

6:30 am-7:41 am

Nonstop2h 11m

Chicago O'Hare Intl

Sat 10/4

5:55 pm-8:55 pm

Nonstop2h 00m

$187

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Tue 12/30

10:33 pm-11:44 pm

Nonstop2h 11m

Chicago O'Hare Intl

Wed 12/31

9:15 pm-12:15 am

Nonstop2h 00m

$187

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Tue 12/2

7:01 am-12:05 pm

1 stop6h 04m

Chicago O'Hare Intl

Fri 12/5

5:03 pm-11:08 pm

1 stop5h 05m

$197

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Tue 10/14

10:10 pm-11:15 pm

Nonstop2h 05m

Chicago O'Hare Intl

Thu 10/16

9:20 pm-12:21 am

Nonstop2h 01m

$200

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Fri 11/7

10:35 pm-11:43 pm

Nonstop2h 08m

Chicago O'Hare Intl

Tue 11/11

8:50 am-11:49 am

Nonstop1h 59m

$203

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Sat 10/25

6:30 am-7:41 am

Nonstop2h 11m

Chicago O'Hare Intl

Mon 10/27

6:20 pm-9:23 pm

Nonstop2h 03m

$203

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Fri 10/10

10:10 pm-11:15 pm

Nonstop2h 05m

Chicago O'Hare Intl

Sat 10/11

2:39 pm-5:37 pm

Nonstop1h 58m

$203

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 22 results
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The best insider tips for Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
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
Airports
IAD

For a smooth departure from IAD, use the Aerotrain for quick access to concourses, but allow extra time for long walks to gates.

Read more about IADby Ramsey Qubein
ORD

Upon arrival at ORD, consider using the 'L' train for a quick and cost-effective trip to downtown Chicago.

Read more about ORDby Ramsey Qubein
Our travel experts
Ramsey Qubein

Ramsey Qubein

Expert on ORD and IAD

Ramsey Qubein

Ramsey Qubein

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

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?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to O'Hare Intl. Price data was last updated on August 29, 2025.

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 83 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, August 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 $245). Flying from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $321). 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 September 11, 2025.

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 39% 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 September 7, 2025.

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 afternoons 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?

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 September 11, 2025.
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
8,937 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Crew

8.1

Comfort

7.3

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
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Crew

8.1

Comfort

7.3

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
5.8
Fair
3,177 reviews
United Airlines
7.4
Good
8,937 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Crew

8.1

Comfort

7.3

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 08m. United Airlines provides one of the quickest options available for as low as $149. Washington, D.C. Dulles Intl Airport and Chicago O'Hare Intl Airport are separated by a distance of 587 mi. Most flights are nonstop.

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

    Frontier, at $100, 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 69% 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 Ethiopian Air (74%) 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 $973, our data shows the cheapest flight currently is $128. When looking at the most popular route, (Washington, D.C. Dulles Intl - Chicago O'Hare Intl), you can expect to pay $117 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, August 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 $245). Flying from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $321). 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
Schaumburg
Rosemont
Skokie
Gurnee
Hoffman Estates
Des Plaines
Elgin
Arlington Heights
Beloit
Racine
Rockford
Orland Park
Oak Brook
Downers Grove
Naperville
Elk Grove Village
Evanston
Merrillville
Bridgeview
Warrenville

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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.
Reagan-National to O'Hare Intl flights
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Baltimore to Midway flights
Dulles Intl 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$100Average$209FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$194Average$337FlexibilityNo cancel feeOn-time69%

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