HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
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
Jul 21 — Jul 281
Tue 7/21
Tue 7/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to O'Hare Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Chicago O'Hare Intl are usually found in September or August, booked 62 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 June 21, 2026.

This Kiwi.com deal was found by Cheapflights users on 6/19. 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 6/308:57 pm
IAD
-
ORD
1 stop12h 06m
Frontier
Tue 7/78:05 am
ORD
-
IAD
1 stop10h 33m
Frontier
Deal found 6/19$248
This Frontier deal was found by Cheapflights users on 6/18. 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.
Mon 7/138:33 pm
IAD
-
ORD
1 stop12h 20m
Frontier
Wed 7/158:05 am
ORD
-
IAD
1 stop10h 33m
Frontier
Deal found 6/18$249
This Frontier deal was found by Cheapflights users on 6/19. 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.
Fri 7/108:33 pm
IAD
-
ORD
1 stop12h 20m
Frontier
Tue 7/217:05 am
ORD
-
IAD
1 stop8h 35m
Frontier
Deal found 6/19$250
This Kiwi.com deal was found by Cheapflights users on 6/17. 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 8/67:48 am
IAD
-
ORD
1 stop13h 05m
Frontier
Mon 8/108:05 am
ORD
-
IAD
1 stop10h 33m
Frontier
Deal found 6/17$252
This United Airlines deal was found by Cheapflights users on 6/19. 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.
Tue 8/188:20 am
IAD
-
ORD
Nonstop2h 18m
United Airlines
Wed 8/196:30 am
ORD
-
IAD
Nonstop1h 58m
United Airlines
Deal found 6/19$253
This United Airlines deal was found by Cheapflights users on 6/21. 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.
Sat 8/110:20 pm
IAD
-
ORD
Nonstop2h 11m
United Airlines
Mon 8/39:40 pm
ORD
-
IAD
Nonstop2h 05m
United Airlines
Deal found 6/21$254
This Frontier deal was found by Cheapflights users on 6/19. 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 8/88:33 pm
IAD
-
ORD
1 stop12h 29m
Frontier
Mon 8/107:05 am
ORD
-
IAD
1 stop9h 09m
Frontier
Deal found 6/19$256
This United Airlines deal was found by Cheapflights users on 6/19. 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.
Tue 7/143:39 pm
IAD
-
ORD
Nonstop2h 23m
United Airlines
Tue 7/211:30 pm
ORD
-
IAD
Nonstop2h 00m
United Airlines
Deal found 6/19$257
This Frontier deal was found by Cheapflights users on 6/19. 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 8/58:33 pm
IAD
-
ORD
1 stop12h 29m
Frontier
Sun 8/91:50 pm
ORD
-
IAD
1 stop8h 05m
Frontier
Deal found 6/19$260

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 June 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$248
(Kiwi.com)

One-way from

$99
(Delta)

Popular in

March

Cheapest in

September

Average price

$417

Good round-trip deal

$353 or less

Good one-way deal

$242 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. 14% potential increase in price ($66 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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.
Search Deals

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 June 21, 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 7/21

5:26 pm-8:31 pm

1 stop4h 05m

Chicago O'Hare Intl

Thu 7/23

6:35 am-2:01 pm

1 stop6h 26m

$257

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Sat 7/18

5:28 pm-11:53 pm

1 stop7h 25m

Chicago O'Hare Intl

Thu 7/23

5:18 pm-11:13 pm

1 stop4h 55m

$257

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Thu 9/10

10:27 pm-11:40 pm

Nonstop2h 13m

Chicago O'Hare Intl

Fri 9/11

10:50 am-1:55 pm

Nonstop2h 05m

$281

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Sat 8/1

5:21 pm-8:31 pm

1 stop4h 10m

Chicago O'Hare Intl

Sat 8/8

5:18 pm-11:26 pm

1 stop5h 08m

$301

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Thu 7/30

10:20 pm-11:31 pm

Nonstop2h 11m

Chicago O'Hare Intl

Sat 8/1

1:30 pm-4:30 pm

Nonstop2h 00m

$317

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Fri 9/11

10:41 am-11:59 am

Nonstop2h 18m

Chicago O'Hare Intl

Fri 9/11

6:15 pm-9:20 pm

Nonstop2h 05m

$317
Quickest round-trip

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Wed 7/15

10:20 pm-11:31 pm

Nonstop2h 11m

Chicago O'Hare Intl

Sat 7/18

6:29 am-9:23 am

Nonstop1h 54m

$317

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

Sat 8/15

10:50 am-1:55 pm

Nonstop2h 05m

$320

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Mon 7/27

7:26 pm-11:53 pm

1 stop5h 27m

Chicago O'Hare Intl

Fri 7/31

8:03 am-2:01 pm

1 stop4h 58m

$323

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Mon 8/31

10:27 pm-11:40 pm

Nonstop2h 13m

Chicago O'Hare Intl

Wed 9/2

6:30 am-9:28 am

Nonstop1h 58m

$325

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/20

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
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 June.
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 61 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 June 21, 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 12% 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 June 13, 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 June 21, 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
9,870 reviews

Food

6.6

Crew

8.1

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
United Airlines
7.4
Good
9,870 reviews
United Airlines
7.4
Good
9,870 reviews

Food

6.6

Crew

8.1

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
Frontier
5.6
Fair
2,875 reviews
United Airlines
7.4
Good
9,870 reviews

Food

6.6

Crew

8.1

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

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. Delta provides one of the quickest options available for as low as $281. 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 $90, 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 76% 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 (88%), Air China (82%) or Ethiopian Air (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 $852, our data shows the cheapest flight currently is $154. When looking at the most popular route, (Washington, D.C. Dulles Intl - Chicago O'Hare Intl), you can expect to pay $177 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
Naperville
Lake Geneva
Gurnee
Delavan
Oakbrook Terrace
Downers Grove
Des Plaines
Hoffman Estates
Oak Brook
South Holland
Libertyville
Racine
Warrenville
Rockford
Great Lakes
Northbrook
Waukegan

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 June 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$90Average$210FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$227Average$388FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.