What are the cheapest airlines flying from London, Ontario to Washington, D.C. Dulles Intl Airport round-trip?

Currently priced at $635, Air Canada will fly you from London, Ontario to Washington, D.C. Dulles Intl Airport and back. In addition to Air Canada, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and WestJet - these airlines can fly you to your destination from $722 and $818, respectively.

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 is the cheapest time of day to fly from YXU to IAD?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London, Ontario to Washington, D.C. Dulles Intl Airport as you normally would.

What airport do you fly from for flights from London to Washington, D.C. Dulles Intl?

Located just 5.3 mi from the city center, London is the airport most travelers will use when flying to Washington, D.C. Dulles Intl from London. Booking flights from London (YXU) to Washington, D.C. Dulles Intl should be relatively easy as there are 0 daily outbound flights to Washington, D.C. Dulles Intl from 0 different airlines.

Can I find deals for flights from London to Dulles Intl that include hotel bookings?

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

How can I find direct flights from London to Dulles Intl?

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

Can I find deals for business class flights from London to Dulles Intl?

Yes. Cheapflights offers flight deals from London 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.

$301+ Flights from London, ON to Washington, D.C. Dulles Intl Airport

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Cheap flight deals from London to Dulles Intl

Round-trip from	$635 (Gotogate)
One-way from	$301 (Kiwi.com)

From London to Washington, D.C. Dulles Intl

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One-way flight from London to Washington, D.C. Dulles Intl

Search Deals

Find flight deals from London to Dulles Intl

Cheapest flights from London to Dulles Intl
Explore the most affordable flight options available from London to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 6, 2025.

Tue 8/199:55 amYXU - IAD

1 stop3h 47mAir Canada

Tue 8/269:35 amIAD - YXU

2 stops7h 32mAir Canada

Deal found 7/6

$635

Tue 8/198:00 pmYXU - IAD

2 stops13h 37mMultiple Airlines

Tue 8/269:35 amIAD - YXU

3 stops19h 39mMultiple Airlines

Deal found 7/6

$639

Tue 8/56:15 amYXU - IAD

2 stops25h 20mUnited Airlines

Tue 8/128:25 amIAD - YXU

2 stops13h 02mUnited Airlines

Deal found 7/6

$722

Wed 8/206:00 amYXU - IAD

1 stop11h 54mWestJet

Wed 8/276:45 pmIAD - YXU

1 stop10h 29mWestJet

Deal found 7/5

$818

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

Tue 8/199:55 amYXU - IAD

1 stop3h 47mAir Canada

Tue 8/269:35 amIAD - YXU

2 stops7h 32mAir Canada

Deal found 7/6

$635

Tue 8/198:00 pmYXU - IAD

2 stops13h 37mMultiple Airlines

Tue 8/269:35 amIAD - YXU

3 stops19h 39mMultiple Airlines

Deal found 7/6

$639

Tue 8/56:15 amYXU - IAD

2 stops25h 20mUnited Airlines

Tue 8/128:25 amIAD - YXU

2 stops13h 02mUnited Airlines

Deal found 7/6

$722

Wed 8/206:00 amYXU - IAD

1 stop11h 54mWestJet

Wed 8/276:45 pmIAD - YXU

1 stop10h 29mWestJet

Deal found 7/5

$818

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

Tue 8/56:15 amYXU - IAD

2 stops25h 20mUnited Airlines

Tue 8/128:25 amIAD - YXU

2 stops13h 02mUnited Airlines

Deal found 7/6

$722

Tue 8/199:55 amYXU - IAD

1 stop3h 47mAir Canada

Tue 8/269:35 amIAD - YXU

2 stops7h 32mAir Canada

Deal found 7/6

$635

Tue 8/198:00 pmYXU - IAD

2 stops13h 37mMultiple Airlines

Tue 8/269:35 amIAD - YXU

3 stops19h 39mMultiple Airlines

Deal found 7/6

$639

Wed 8/206:00 amYXU - IAD

1 stop11h 54mWestJet

Wed 8/276:45 pmIAD - YXU

1 stop10h 29mWestJet

Deal found 7/5

$818

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

Wed 8/206:00 amYXU - IAD

2 stops28h 44mMultiple Airlines

Deal found 7/6

$301

Wed 8/209:55 amYXU - IAD

1 stop3h 47mAir Canada

Deal found 7/6

$352

Thu 7/316:15 amYXU - IAD

2 stops10h 06mUnited Airlines

Deal found 7/6

$444

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Tue 8/19

9:55 am-1:42 pm

1 stop3h 47m

Washington, D.C. Dulles Intl

Tue 8/26

9:35 am-5:07 pm

2 stops7h 32m

$635

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Tue 8/19

8:00 pm-9:37 am

2 stops13h 37m

Washington, D.C. Dulles Intl

Tue 8/26

9:35 am-5:14 am

3 stops19h 39m

$639

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Tue 8/5

6:15 am-7:35 am

2 stops25h 20m

Washington, D.C. Dulles Intl

Tue 8/12

8:25 am-9:27 pm

2 stops13h 02m

$722

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 8/20

6:00 am-5:54 pm

1 stop11h 54m

Washington, D.C. Dulles Intl

Wed 8/27

6:45 pm-5:14 am

1 stop10h 29m

$818

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 8/20

6:00 am-10:44 am

2 stops28h 44m

$301

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 8/20

9:55 am-1:42 pm

1 stop3h 47m

$352

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 7/31

6:15 am-4:21 pm

2 stops10h 06m

$444

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/6

Best time to book a flight from London to Dulles Intl

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

What is the cheapest month to book a flight from London, Ontario to Washington, D.C. Dulles Intl Airport?

Currently, August is the cheapest month in which you can book a flight from London, Ontario to Washington, D.C. Dulles Intl Airport (average of $309). Flying from London, Ontario 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.

Reviews of airlines servicing Dulles Intl

Read through reviews of airlines operating flights from London to Washington, D.C. Dulles Intl Airport, such as United Airlines, WestJet, and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,844 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2024

YVR - SFO

It was a good experience. The flight took 45 minutes longer to fly and all passengers had to wait inside the plane till the technical issue was fixed. Overall it was a good experience.

United Airlines

7.4

Good

8,844 reviews

United Airlines

7.4

Good

8,844 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2024

YVR - SFO

It was a good experience. The flight took 45 minutes longer to fly and all passengers had to wait inside the plane till the technical issue was fixed. Overall it was a good experience.

WestJet

7.2

Good

2,916 reviews

United Airlines

7.4

Good

8,844 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2024

YVR - SFO

It was a good experience. The flight took 45 minutes longer to fly and all passengers had to wait inside the plane till the technical issue was fixed. Overall it was a good experience.

Air Canada

7.1

Good

9,669 reviews

United Airlines

7.4

Good

8,844 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2024

YVR - SFO

It was a good experience. The flight took 45 minutes longer to fly and all passengers had to wait inside the plane till the technical issue was fixed. Overall it was a good experience.

Related info for your journey

What airport do you fly from for flights from London to Washington, D.C. Dulles Intl?
Located just 5.3 mi from the city center, London is the airport most travelers will use when flying to Washington, D.C. Dulles Intl from London. Booking flights from London (YXU) to Washington, D.C. Dulles Intl should be relatively easy as there are 0 daily outbound flights to Washington, D.C. Dulles Intl from 0 different airlines.
What are the cheapest airlines flying from London, Ontario to Washington, D.C. Dulles Intl Airport round-trip?
Currently priced at $635, Air Canada will fly you from London, Ontario to Washington, D.C. Dulles Intl Airport and back. In addition to Air Canada, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and WestJet - these airlines can fly you to your destination from $722 and $818, respectively.
Can I find deals for flights from London to Dulles Intl that include hotel bookings?
Yes. In addition to deals on London to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from London to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Dulles Intl.
Can I find deals for business class flights from London to Dulles Intl?
Yes. Cheapflights offers flight deals from London 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 London, Ontario to Washington, D.C. Dulles Intl Airport?
Currently, August is the cheapest month in which you can book a flight from London, Ontario to Washington, D.C. Dulles Intl Airport (average of $309). Flying from London, Ontario 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

Arlington

Woodbridge

Alexandria

Tysons

Silver Spring

Fredericksburg

Linthicum Heights

Gaithersburg

Fairfax

Easton

Towson

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Laurel

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Rockville

Springfield

National Harbor

Manassas

Dundalk

Bowie

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$301+ Cheap flights from London, ON (YXU) 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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from London to Dulles Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from London to Dulles Intl

Round-trip from

One-way from

Find flight deals from London to Dulles Intl

Cheapest flights from London to Dulles IntlExplore the most affordable flight options available from London to Dulles 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 London to Dulles 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 London to Washington, D.C. Dulles Intl Airport that are best for you.

Best time to book a flight from London to Dulles Intl

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

Cheapflights Insights

Everything you need to know about your flight from London to Washington, D.C. Dulles Intl Airport

What is the cheapest month to book a flight from London, Ontario to Washington, D.C. Dulles Intl Airport?

Reviews of airlines servicing Dulles Intl

Read through reviews of airlines operating flights from London to Washington, D.C. Dulles Intl Airport, such as United Airlines, WestJet, and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from London 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 airport do you fly from for flights from London to Washington, D.C. Dulles Intl?

What are the cheapest airlines flying from London, Ontario to Washington, D.C. Dulles Intl Airport round-trip?

Can I find deals for flights from London to Dulles Intl that include hotel bookings?

How can I find direct flights from London to Dulles Intl?

Can I find deals for business class flights from London to Dulles Intl?

What is the cheapest month to book a flight from London, Ontario to Washington, D.C. Dulles Intl Airport?

Traveling to a place near London?

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Alternative routes for London to Dulles Intl

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Cheapest flights from London to Dulles Intl
Explore the most affordable flight options available from London to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 6, 2025.