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Dulles Intl

$287+ 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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — IAD
Mar 7 — Mar 141
Sat 3/7
Sat 3/14
1 adult, Economy
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Cheap 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 February 5, 2026.

This Air Canada deal was found by Cheapflights users on 2/2. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/309:40 am
YXU
-
IAD
1 stop5h 54m
Air Canada
Tue 3/314:30 pm
IAD
-
YXU
1 stop4h 48m
Air Canada
Deal found 2/2$473
This United Airlines deal was found by Cheapflights users on 2/4. 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.
Mon 3/305:10 am
YXU
-
IAD
2 stops10h 53m
United Airlines
Tue 3/318:20 am
IAD
-
YXU
2 stops8h 43m
United Airlines
Deal found 2/4$541

Find flight deals from London to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from London (YXU) to Dulles Intl (IAD). 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 February 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$473
(Air Canada)

One-way from

$287
(Air Canada)
Provider with most accurate pricing for London-Washington, D.C. Dulles Intl flight deals.
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Provider most trusted by Cheapflights users for London-Washington, D.C. Dulles Intl flights.
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From London to Washington, D.C. Dulles Intl
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One-way flight from London to Washington, D.C. Dulles Intl
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Cheapflights Fare Finder

 
Customize your flight search to find flights from London to Dulles 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 February 5, 2026.
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

London

Fly to

Dulles Intl

Route

Depart

Return

Price

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Mon 3/30

9:40 am-3:34 pm

1 stop5h 54m

Washington, D.C. Dulles Intl

Tue 3/31

4:30 pm-9:18 pm

1 stop4h 48m

$473

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Mon 3/30

5:10 am-4:03 pm

2 stops10h 53m

Washington, D.C. Dulles Intl

Tue 3/31

8:20 am-5:03 pm

2 stops8h 43m

$541

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 3/4

9:40 am-3:46 pm

1 stop6h 06m

$287

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 3/4

9:40 am-9:18 pm

2 stops11h 38m

$320

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

  • Most accurate provider: When it comes to deals on London, Ontario-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London, Ontario-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London, Ontario-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London, Ontario-Washington, D.C. Dulles 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 London, Ontario-Washington, D.C. Dulles 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 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, February is the cheapest month in which you can book a flight from London, Ontario to Washington, D.C. Dulles Intl Airport (average of $131). Flying from London, Ontario to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of $218). 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.

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?

    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.

  • How long is the flight from London, Ontario to Washington, D.C. Dulles Intl Airport?

    There are many flights that can get you from London, Ontario to Washington, D.C. Dulles Intl Airport in 5h 54m. Fly via Air Canada to get the fastest option. Airlines will cover a distance of 341 mi.

  • 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, February is the cheapest month in which you can book a flight from London, Ontario to Washington, D.C. Dulles Intl Airport (average of $131). Flying from London, Ontario to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of $218). 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 Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Silver Spring
Herndon
Fredericksburg
Hanover
Linthicum Heights
Rockville
Laurel
Towson
Upper Marlboro
Manassas
Largo
Bowie
McLean
Clinton

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