For a smooth departure from IAD, use the Aerotrain for quick access to concourses, but allow extra time for long walks to gates.
$90+ 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 7/7. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — ORD
Jun 20 — Jun 271
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 83 days in advance, depart on a Friday or Tuesday 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 June 15, 2025.
Round-trip from | $168 (United Airlines) |
|---|---|
One-way from | $90 (Frontier) |
Popular in | December |
Cheapest in | September |
Average price | $369 |
Good round-trip deal | $299 or less |
Good one-way deal | $149 or less |
Find flight deals from Dulles Intl to O'Hare Intl
Cheapest flights from Dulles Intl to O'Hare IntlExplore 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 15, 2025.
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 15, 2025.
This United Airlines deal was found by Cheapflights users on 6/15. 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.
Thu 8/286:40 pmIAD - ORD
Nonstop2h 08mUnited Airlines
Sun 8/3110:43 amORD - IAD
Nonstop2h 06mUnited Airlines
Deal found 6/15![United Airlines logo]()
$168
This Cheapflightsfares deal was found by Cheapflights users on 6/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/76:10 amIAD - ORD
1 stop5h 15mFrontier
Wed 7/95:34 pmORD - IAD
1 stop5h 38mFrontier
Deal found 6/13![Frontier logo]()
$178
This Delta deal was found by Cheapflights users on 6/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/126:00 amIAD - ORD
1 stop5h 20mDelta
Tue 8/199:10 amORD - IAD
1 stop6h 21mDelta
Deal found 6/14![Delta logo]()
$197
This Sun Country Air deal was found by Cheapflights users on 6/14. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/258:20 pmIAD - ORD
1 stop22h 07mSun Country Air
Mon 7/286:15 pmORD - IAD
1 stop16h 22mSun Country Air
Deal found 6/14![Sun Country Air logo]()
$245
This Mytrip deal was found by Cheapflights users on 6/14. 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.
Mon 7/2112:52 pmIAD - ORD
1 stop5h 35mMultiple Airlines
Fri 7/254:37 pmORD - IAD
1 stop27h 16mMultiple Airlines
Deal found 6/14![Multiple Airlines logo]()
$248
This American Airlines deal was found by Cheapflights users on 6/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/99:14 amIAD - ORD
1 stop7h 42mAmerican Airlines
Tue 8/1910:26 amORD - IAD
1 stop7h 26mAmerican Airlines
Deal found 6/14![American Airlines logo]()
$251
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 15, 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
Thu 8/28
6:40 pm-7:48 pm
Nonstop2h 08m
Chicago O'Hare Intl
Sun 8/31
10:43 am-1:49 pm
Nonstop2h 06m
$168
Washington, D.C.Chicago
IAD - ORD
IADORD
Washington, D.C. Dulles Intl
Mon 7/7
6:10 am-10:25 am
1 stop5h 15m
Chicago O'Hare Intl
Wed 7/9
5:34 pm-12:12 am
1 stop5h 38m
$178
Washington, D.C.Chicago
IAD - ORD
IADORD
Washington, D.C. Dulles Intl
Tue 8/12
6:00 am-10:20 am
1 stop5h 20m
Chicago O'Hare Intl
Tue 8/19
9:10 am-4:31 pm
1 stop6h 21m
$197
Washington, D.C.Chicago
IAD - ORD
IADORD
Washington, D.C. Dulles Intl
Fri 7/25
8:20 pm-5:27 pm
1 stop22h 07m
Chicago O'Hare Intl
Mon 7/28
6:15 pm-11:37 am
1 stop16h 22m
$245
Washington, D.C.Chicago
IAD - ORD
IADORD
Washington, D.C. Dulles Intl
Mon 7/21
12:52 pm-5:27 pm
1 stop5h 35m
Chicago O'Hare Intl
Fri 7/25
4:37 pm-8:53 pm
1 stop27h 16m
$248
Washington, D.C.Chicago
IAD - ORD
IADORD
Washington, D.C. Dulles Intl
Sat 8/9
9:14 am-3:56 pm
1 stop7h 42m
Chicago O'Hare Intl
Tue 8/19
10:26 am-6:52 pm
1 stop7h 26m
$251
Washington, D.C.Chicago
IAD - ORD
IADORD
Washington, D.C. Dulles Intl
Mon 7/7
6:10 am-10:25 am
1 stop5h 15m
$90
Washington, D.C.Chicago
IAD - ORD
IADORD
Washington, D.C. Dulles Intl
Thu 10/9
6:30 am-7:41 am
Nonstop2h 11m
$93
Washington, D.C.Chicago
IAD - ORD
IADORD
Washington, D.C. Dulles Intl
Wed 10/15
6:00 am-12:08 pm
1 stop7h 08m
$99
Washington, D.C.Chicago
IAD - ORD
IADORD
Washington, D.C. Dulles Intl
Sun 7/20
11:58 am-5:58 pm
2 stops31h 00m
$119
Showing 1-10 of 12 results
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
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 June 13, 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 June 15, 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 42% 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 15, 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.
Weekly flight availability from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport
Explore weekly flight availability from Dulles Intl to O'Hare Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 15, 2025.
The most flights from IAD to ORD are scheduled on a Sunday (30 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (20 on average).
Rainfall in O'Hare Intl by month
Plan your trip to O'Hare Intl by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Chicago O'Hare Intl Airport ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Chicago O'Hare Intl Airport when rainfall is around 1.7 in.
Temperature in O'Hare Intl by month
Plan your trip to O'Hare Intl by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Chicago O'Hare Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).
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 15, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines and American Airlines from Washington, D.C. to Chicago 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.
Entertainment
7.9
Boarding
8.2
Overall
8.0
Comfort
7.9
Crew
8.5
Food
7.3
Reviews
1 / 20
10.0
ExcellentKim,May 2025
PIH - SLC
Entertainment
7.9
Boarding
8.2
Overall
8.0
Comfort
7.9
Crew
8.5
Food
7.3
Reviews
1 / 20
10.0
ExcellentKim,May 2025
PIH - SLC
Entertainment
7.9
Boarding
8.2
Overall
8.0
Comfort
7.9
Crew
8.5
Food
7.3
Reviews
1 / 20
10.0
ExcellentKim,May 2025
PIH - SLC
Entertainment
7.9
Boarding
8.2
Overall
8.0
Comfort
7.9
Crew
8.5
Food
7.3
Reviews
1 / 20
10.0
ExcellentKim,May 2025
PIH - SLC
Entertainment
7.9
Boarding
8.2
Overall
8.0
Comfort
7.9
Crew
8.5
Food
7.3
Reviews
1 / 20
10.0
ExcellentKim,May 2025
PIH - SLC
Entertainment
7.9
Boarding
8.2
Overall
8.0
Comfort
7.9
Crew
8.5
Food
7.3
Reviews
1 / 20
10.0
ExcellentKim,May 2025
PIH - SLC
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.
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 locationsSchaumburg
Hoffman Estates
Rosemont
Beloit
Elgin
Skokie
Arlington Heights
Rockford
Naperville
Orland Park
Elk Grove Village
Tinley Park
Merrillville
Bridgeview
Racine
Glenview
Des Plaines
Lake Geneva
Gurnee
Joliet
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.
Top 4 airlines flying from Dulles Intl to O'Hare Intl
Discover the top 4 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 15, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$87 | Average$142 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$176 | Average$216 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$185 | Average$326 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$388 | Average$402 | FlexibilityNo cancel fee | On-time71% |