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.

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).

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

Before booking your flight from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport check out the most popular airlines for this route: American Airlines, Delta or Frontier.

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

Travelers have found that booking a Thursday departure is the best way to save up to 28% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

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.

$89+ Flights from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport

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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 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

Round-trip from	$154 (Cheapflightsfares)
One-way from	$89 (Trip.com)
Popular in	December
Cheapest in	September
Average price	$299
Good round-trip deal	$301 or less
Good one-way deal	$168 or less

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. 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 July 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 July 6, 2025.

Sun 9/216:10 amIAD - ORD

1 stop5h 18mFrontier

Sat 9/275:45 pmORD - IAD

1 stop5h 10mFrontier

Deal found 7/5

$154

Thu 8/76:35 amIAD - ORD

Nonstop2h 14mUnited Airlines

Tue 8/1210:50 amORD - IAD

Nonstop1h 59mUnited Airlines

Deal found 7/5

$157

Tue 8/56:00 amIAD - ORD

1 stop5h 16mDelta

Tue 8/127:15 amORD - IAD

1 stop3h 17mDelta

Deal found 7/6

$197

Thu 8/711:58 amIAD - ORD

2 stops13h 00mMultiple Airlines

Wed 8/1312:10 pmORD - IAD

2 stops21h 04mMultiple Airlines

Deal found 7/5

$214

Best flights from Dulles Intl to O'Hare Intl
Discover carefully curated flight deals from Dulles Intl to O'Hare Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 6, 2025.

Sun 9/216:10 amIAD - ORD

1 stop5h 18mFrontier

Sat 9/275:45 pmORD - IAD

1 stop5h 10mFrontier

Deal found 7/5

$154

Thu 8/76:35 amIAD - ORD

Nonstop2h 14mUnited Airlines

Mon 8/119:31 pmORD - IAD

Nonstop1h 59mUnited Airlines

Deal found 7/4

$157

Thu 8/214:56 pmIAD - ORD

2 stops17h 25mMultiple Airlines

Sat 8/2311:36 amORD - IAD

2 stops22h 08mMultiple Airlines

Deal found 7/5

$193

Wed 8/66:00 amIAD - ORD

1 stop5h 16mDelta

Wed 8/137:15 amORD - IAD

1 stop3h 17mDelta

Deal found 7/4

$197

Sat 7/2612:40 pmIAD - ORD

1 stop5h 47mSun Country Air

Wed 7/308:10 pmORD - IAD

1 stop13h 29mSun Country Air

Deal found 7/4

$240

Last-minute flights from Dulles Intl to O'Hare Intl
Discover last-minute flight deals from Dulles Intl to O'Hare Intl. Data last updated July 6, 2025 and is based on user searches.

Fri 7/116:10 amIAD - ORD

1 stop5h 15mFrontier

Wed 7/165:34 pmORD - IAD

1 stop5h 38mFrontier

Deal found 7/5

$235

Sat 7/1212:40 pmIAD - ORD

1 stop5h 29mSun Country Air

Mon 7/286:15 pmORD - IAD

1 stop16h 22mSun Country Air

Deal found 7/5

$295

Sat 7/123:39 pmIAD - ORD

Nonstop2h 13mUnited Airlines

Sat 7/127:45 pmORD - IAD

1 stop10h 43mUnited Airlines

Deal found 7/6

$340

Wed 7/1612:22 pmIAD - ORD

1 stop6h 05mMultiple Airlines

Sun 7/205:05 amORD - IAD

2 stops27h 18mMultiple Airlines

Deal found 7/6

$359

Fri 7/251:27 pmIAD - ORD

1 stop11h 04mFrontier

Mon 7/285:01 amORD - IAD

1 stop7h 48mFrontier

Deal found 7/6

$192

Sat 7/2612:40 pmIAD - ORD

1 stop5h 47mSun Country Air

Tue 7/2912:08 pmORD - IAD

1 stop22h 35mSun Country Air

Deal found 7/6

$255

Tue 8/56:00 amIAD - ORD

1 stop5h 16mDelta

Tue 8/127:15 amORD - IAD

1 stop3h 17mDelta

Deal found 7/6

$197

Thu 8/76:35 amIAD - ORD

Nonstop2h 14mUnited Airlines

Tue 8/1210:50 amORD - IAD

Nonstop1h 59mUnited Airlines

Deal found 7/5

$157

Thu 8/711:58 amIAD - ORD

2 stops13h 00mMultiple Airlines

Wed 8/1312:10 pmORD - IAD

2 stops21h 04mMultiple Airlines

Deal found 7/5

$214

One-way flights from Dulles Intl to O'Hare Intl
Search for one-way flight options from Dulles Intl to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated July 6, 2025.

Sat 7/264:17 pmIAD - ORD

1 stop8h 12mFrontier

Deal found 7/6

$89

Sat 8/303:55 pmIAD - ORD

Nonstop2h 15mUnited Airlines

Deal found 7/6

$90

Wed 11/512:30 pmIAD - ORD

1 stop6h 06mDelta

Deal found 7/6

$99

Thu 8/1411:04 amIAD - ORD

2 stops23h 17mMultiple Airlines

Deal found 7/5

$113

Sat 7/2612:40 pmIAD - ORD

1 stop5h 47mSun Country Air

Deal found 7/6

$120

Wed 7/306:35 amIAD - ORD

1 stop5h 02mAmerican Airlines

Deal found 7/6

$126

Cheapflights Fare Finder

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

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Sun 9/21

6:10 am-10:28 am

1 stop5h 18m

Chicago O'Hare Intl

Sat 9/27

5:45 pm-11:55 pm

1 stop5h 10m

$154

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Thu 8/7

6:35 am-7:49 am

Nonstop2h 14m

Chicago O'Hare Intl

Tue 8/12

10:50 am-1:49 pm

Nonstop1h 59m

$157

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Tue 8/5

6:00 am-10:16 am

1 stop5h 16m

Chicago O'Hare Intl

Tue 8/12

7:15 am-11:32 am

1 stop3h 17m

$197

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Thu 8/7

11:58 am-11:58 pm

2 stops13h 00m

Chicago O'Hare Intl

Wed 8/13

12:10 pm-10:14 am

2 stops21h 04m

$214

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Mon 7/28

1:34 pm-11:09 am

1 stop22h 35m

Chicago O'Hare Intl

Fri 8/8

6:17 pm-12:01 pm

1 stop16h 44m

$245

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Sat 7/26

4:17 pm-11:29 pm

1 stop8h 12m

$89

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Sat 8/30

3:55 pm-5:10 pm

Nonstop2h 15m

$90

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Wed 11/5

5:25 pm-11:53 pm

1 stop7h 28m

$99

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Thu 8/14

11:04 am-9:21 am

2 stops23h 17m

$113

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Sat 7/26

12:40 pm-5:27 pm

1 stop5h 47m

$120

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/6

Showing 1-10 of 11 results

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

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.

ORD

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

Our travel experts

Ramsey Qubein

Expert on ORD and IAD

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 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?

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?

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

The most flights from IAD to ORD are scheduled on a Sunday (29 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (13 on average).

Reviews of airlines servicing O'Hare Intl

Peruse reviews from past customers who have flown with Delta, United Airlines, and American Airlines 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.

Delta

8.0

Very good

7,967 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,967 reviews

Delta

8.0

Very good

7,967 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,846 reviews

Delta

8.0

Very good

7,967 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,967 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Sun Country Air

6.9

Okay

336 reviews

Delta

8.0

Very good

7,967 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Frontier

5.9

Fair

3,278 reviews

Delta

8.0

Very good

7,967 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport round-trip?
Frontier, at $154, was found to be the cheapest airline from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport.Alternate airlines to your destination round-trip include United Airlines and Delta. Frontier is 52% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport one-way?
The cheapest airlines for a one-way flight from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport are Frontier ($89), United Airlines ($90), and Delta ($99).
What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport?
Consider Egyptair (88%), Ethiopian Air (80%) or Air China (79%) 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 $1,584, our data shows the cheapest flight currently is $114. When looking at the most popular route, (Washington, D.C. Dulles Intl - Chicago O'Hare Intl), you can expect to pay $157 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

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Top 4 airlines flying from Dulles Intl to O'Hare Intl

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$87	Average$160	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$176	Average$208	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$189	Average$326	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$388	Average$402	FlexibilityNo cancel fee	On-time71%

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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.

	
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$89+ 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 7/26. Fares are subject to change and may not be available on all flights or dates of travel.

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

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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

Round-trip from

One-way from

Popular in

Cheapest in

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Good one-way deal

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 July 6, 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 July 6, 2025.

Cheapflights Fare Finder

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.

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

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

ORD

Our travel experts

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.

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 27, 2025.

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

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 6, 2025.

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 29, 2025.

Weekly flight availability from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport

Reviews of airlines servicing O'Hare Intl

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.

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

What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Chicago O'Hare Intl Airport one-way?

What are the most reliable airlines 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?

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

How can I 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?

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

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

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Alternative routes for Dulles Intl to O'Hare Intl

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Top 4 airlines flying from Dulles Intl to O'Hare Intl

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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 6, 2025.