In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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

Delta, Frontier and United Airlines are the most popular airlines when flying from Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport.

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

Departing on a Thursday is a good option for securing a great price. You can expect to save up to 41% when planning your travel around this day of the week.

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

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

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

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

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

Yes. Cheapflights offers flight deals from O'Hare Intl to Dulles 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.

$80+ Flights from Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport

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Cheapflights Tip: The best prices from Chicago O'Hare Intl to Washington, D.C. Dulles Intl are usually found in August or November, booked 90 days in advance, depart on a Friday or Wednesday and return on a Friday

Cheap flight deals from O'Hare Intl to Dulles Intl

Round-trip from	$150 (Priceline)
One-way from	$80 (FlightHub)
Popular in	June
Cheapest in	August
Average price	$299
Good round-trip deal	$496 or less
Good one-way deal	$176 or less

From Chicago O'Hare Intl to Washington, D.C. Dulles Intl

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One-way flight from Chicago O'Hare Intl to Washington, D.C. Dulles Intl

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Highest demand for flights based on searches. 2% potential increase in price ($8 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($5 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 Chicago O'Hare Intl to Washington, D.C. Dulles Intl.

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Cheapest flights from O'Hare Intl to Dulles Intl
Explore the most affordable flight options available from O'Hare Intl to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.

Wed 7/165:34 pmORD - IAD

1 stop5h 38mFrontier

Mon 7/216:07 pmIAD - ORD

1 stop7h 18mFrontier

Deal found 6/30

$150

Fri 8/110:50 amORD - IAD

Nonstop1h 59mUnited Airlines

Mon 8/43:39 pmIAD - ORD

Nonstop2h 13mUnited Airlines

Deal found 6/30

$193

Thu 8/149:10 amORD - IAD

1 stop6h 21mDelta

Thu 8/217:30 pmIAD - ORD

1 stop5h 26mDelta

Deal found 6/30

$197

Best flights from O'Hare Intl to Dulles Intl
Discover carefully curated flight deals from O'Hare Intl to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 1, 2025.

Wed 7/165:34 pmORD - IAD

1 stop5h 38mFrontier

Mon 7/216:07 pmIAD - ORD

1 stop7h 18mFrontier

Deal found 6/30

$150

Mon 7/282:24 pmORD - IAD

Nonstop2h 06mUnited Airlines

Thu 8/76:35 amIAD - ORD

Nonstop2h 14mUnited Airlines

Deal found 6/29

$193

Thu 8/149:10 amORD - IAD

1 stop6h 21mDelta

Thu 8/217:30 pmIAD - ORD

1 stop5h 26mDelta

Deal found 6/30

$197

Last-minute flights from O'Hare Intl to Dulles Intl
Discover last-minute flight deals from O'Hare Intl to Dulles Intl. Data last updated July 1, 2025 and is based on user searches.

Mon 7/76:15 pmORD - IAD

1 stop16h 58mSun Country Air

Wed 7/1612:22 pmIAD - ORD

1 stop6h 05mSun Country Air

Deal found 6/30

$348

Thu 7/105:01 amORD - IAD

1 stop9h 27mFrontier

Sun 7/137:46 pmIAD - ORD

1 stop28h 45mFrontier

Deal found 6/29

$174

Thu 7/105:40 pmORD - IAD

2 stops19h 43mMultiple Airlines

Sun 7/1311:58 amIAD - ORD

2 stops12h 55mMultiple Airlines

Deal found 6/29

$370

Fri 7/116:30 pmORD - IAD

1 stop16h 35mUnited Airlines

Sat 7/123:39 pmIAD - ORD

Nonstop2h 13mUnited Airlines

Deal found 6/30

$369

Wed 7/165:34 pmORD - IAD

1 stop5h 38mFrontier

Mon 7/216:07 pmIAD - ORD

1 stop7h 18mFrontier

Deal found 6/30

$150

Mon 7/282:24 pmORD - IAD

Nonstop2h 06mUnited Airlines

Thu 8/76:35 amIAD - ORD

Nonstop2h 14mUnited Airlines

Deal found 6/29

$193

One-way flights from O'Hare Intl to Dulles Intl
Search for one-way flight options from O'Hare Intl to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated July 1, 2025.

Sat 7/195:07 pmORD - IAD

1 stop5h 12mFrontier

Deal found 6/30

$80

Sun 8/3110:43 amORD - IAD

Nonstop2h 06mUnited Airlines

Deal found 6/30

$90

Sat 8/95:38 pmORD - IAD

2 stops16h 30mMultiple Airlines

Deal found 6/29

$100

Sat 8/91:46 pmORD - IAD

1 stop5h 30mDelta

Deal found 6/30

$101

Sat 8/27:05 amORD - IAD

1 stop4h 44mAmerican Airlines

Deal found 6/30

$126

Cheapflights Fare Finder

Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Wed 7/16

5:34 pm-12:12 am

1 stop5h 38m

Washington, D.C. Dulles Intl

Mon 7/21

6:07 pm-12:25 am

1 stop7h 18m

$150

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Fri 8/1

8:52 am-11:55 am

Nonstop2h 03m

Washington, D.C. Dulles Intl

Tue 8/19

6:40 pm-7:48 pm

Nonstop2h 08m

$193

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Thu 8/14

9:10 am-4:31 pm

1 stop6h 21m

Washington, D.C. Dulles Intl

Thu 8/21

7:30 pm-11:56 pm

1 stop5h 26m

$197

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Sat 7/19

5:07 pm-11:19 pm

1 stop5h 12m

$80

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Sun 8/31

10:43 am-1:49 pm

Nonstop2h 06m

$90

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Wed 8/20

7:15 am-11:32 am

1 stop3h 17m

$99

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Sat 8/9

5:38 pm-11:08 am

2 stops16h 30m

$100

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Sat 8/2

7:05 am-12:49 pm

1 stop4h 44m

$126

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

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

Cheapflights partnered with top experts to bring you the best recommendations for your Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport trip

Airlines

Ethiopian Air

Economy Class offers 32-inch pitch and 17-inch width seats, enhancing comfort.

ShebaSkyConnect provides Wi-Fi on A350, B777, and most B787 aircraft.

Read more about Ethiopian Airby Paul Rubio

United Airlines

Basic Economy allows no carry-on bags, except for MileagePlus members or credit card holders.

United First includes 2 free checked bags and priority perks on the ground.

Read more about United Airlinesby Harriet Baskas

Airports

ORD

For a quick departure, use the free shuttle train to navigate between terminals at ORD, especially if your flight is from a different terminal.

IAD

Use the Washington Metro Silver line for a cost-effective ride to D.C. from IAD, taking less than 40 minutes to reach the city.

Our travel experts

Paul Rubio

Expert on Ethiopian Air

Harriet Baskas

Expert on United Airlines

Ramsey Qubein

Expert on ORD and IAD

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

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

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

To ensure you get the cheapest price possible for a flight from Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport, you should look to book at least 90 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, August is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $345). 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 ORD to IAD?

It’s typically best to fly out from Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport in the morning. Doing so could potentially save you 54% on the flight price compared to flying at noon, which is usually more expensive.

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

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

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

The most flights from ORD to IAD are scheduled on a Monday (29 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (21 on average).

Reviews of airlines servicing Dulles Intl

See what other customers who have flown with Delta, United Airlines, and American Airlines from Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,973 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

7,973 reviews

Delta

8.0

Very good

7,973 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

8,852 reviews

Delta

8.0

Very good

7,973 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

7,973 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

3,289 reviews

Delta

8.0

Very good

7,973 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 Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport round-trip?
Flying on Frontier is currently your cheapest option to Washington, D.C. Dulles Intl Airport, with prices starting at $150. Additional round-trip tickets that might be worth considering are offered by United Airlines and Delta, with the lowest prices starting at $193 and $197, respectively. Frontier is currently priced 51% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport one-way?
The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $80. However, be on the lookout for offers from United Airlines and Delta, as they are both options that can get you from Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport for a low price.
What are the most reliable airlines from Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport?
No one likes to see their flight delayed. When booking a flight from Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport consider choosing Sun Country Air (100%), Air China (94%) or Austrian Airlines (89%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport?
Looking for the cheapest flight from Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport? While on average our users pay $2,430, our data indicates the cheapest price to be $113. The most popular route (Chicago O'Hare Intl - Washington, D.C. Dulles Intl), is priced around $117.
Can I find deals for flights from O'Hare Intl to Dulles Intl that include hotel bookings?
Yes. In addition to deals on O'Hare Intl to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from O'Hare Intl to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from O'Hare Intl to Dulles Intl.
Can I find deals for business class flights from O'Hare Intl to Dulles Intl?
Yes. Cheapflights offers flight deals from O'Hare Intl to Dulles 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 Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport?
Currently, August is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $345). 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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National Harbor

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Dundalk

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Top 3 airlines flying from O'Hare Intl to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$54	Average$191	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$176	Average$248	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$179	Average$303	FlexibilityNo cancel fee	On-time69%

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$80+ Cheap flights from O'Hare Intl (ORD) to Dulles Intl (IAD)

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 7/19. Fares are subject to change and may not be available on all flights or dates of travel.

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

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3. Compare prices and book

Cheapflights Tip: The best prices from Chicago O'Hare Intl to Washington, D.C. Dulles Intl are usually found in August or November, booked 90 days in advance, depart on a Friday or Wednesday and return on a Friday

Cheap flight deals from O'Hare Intl to Dulles Intl

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Cheapest flights from O'Hare Intl to Dulles IntlExplore the most affordable flight options available from O'Hare Intl to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.

Explore the most affordable flight options available from O'Hare Intl to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport that are best for you.

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

Cheapflights partnered with top experts to bring you the best recommendations for your Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport trip

Airlines

Ethiopian Air

United Airlines

Airports

ORD

IAD

Our travel experts

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

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from O'Hare Intl with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Chicago O'Hare Intl Airport to Washington, D.C. Dulles Intl Airport

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

Use this chart to determine the optimal time to book a round-trip flight from O'Hare Intl to Dulles Intl. Price data was last updated on June 27, 2025.

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

What is the cheapest time of day to fly from ORD to IAD?

Find hourly flight availability from O'Hare Intl to Dulles 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 1, 2025.

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

Use this chart to determine the cheapest time to fly round-trip from O'Hare Intl to Dulles Intl. Price data was last updated on June 22, 2025.

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

Reviews of airlines servicing Dulles Intl

Related info for your journey

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

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

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

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

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

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

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

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

Traveling to a place near Chicago O'Hare Intl Airport?

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Alternative routes for O'Hare Intl to Dulles Intl

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Top 3 airlines flying from O'Hare Intl to Dulles Intl

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Cheapest flights from O'Hare Intl to Dulles Intl
Explore the most affordable flight options available from O'Hare Intl to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.