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YXU - IAD

Find cheap flights from London to Washington Dulles Airport from C$ 318

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to Washington, D.C. departing on 2/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Fri 7/6
Fri 14/6

Search hundreds of travel sites at once for deals on flights to Washington Dulles Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Washington, D.C., as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Washington, D.C., as well as popular online travel agencies
In the last 7 days, travellers have searched 43,968,530 times on KAYAK, and here is why:

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Cheap flight deals from London to Washington, D.C. (YXU-IAD)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from London to Washington, D.C. that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
3:20 p.m. - 8:19 p.m.YXU-IAD
4h 59m1 stop
4:00 p.m. - 9:37 p.m.IAD-YXU
5h 37m1 stop
C$ 620Air Canada
Find Deal
Sat, 31 Aug - Wed, 4 Sep
3:20 p.m. - 9:16 p.m.YXU-IAD
5h 56m1 stop
4:00 p.m. - 9:35 p.m.IAD-YXU
5h 35m1 stop
C$ 677
Find Deal
Sat, 20 Jul - Wed, 7 Aug
9:50 a.m. - 8:29 p.m.YXU-IAD
10h 39m2 stops
9:55 a.m. - 5:47 p.m.IAD-YXU
7h 52m2 stops
C$ 704Air Canada
Find Deal
Sat, 31 Aug - Wed, 4 Sep
3:20 p.m. - 8:19 p.m.YXU-IAD
4h 59m1 stop
4:00 p.m. - 9:37 p.m.IAD-YXU
5h 37m1 stop
C$ 749Air Canada
Find Deal
Sat, 31 Aug - Wed, 4 Sep
9:50 a.m. - 10:37 p.m.YXU-IAD
12h 47m2 stops
8:24 a.m. - 2:45 p.m.IAD-YXU
6h 21m1 stop
C$ 785United Airlines
Find Deal
Sat, 20 Jul - Wed, 7 Aug
9:50 a.m. - 10:37 p.m.YXU-IAD
12h 47m2 stops
6:00 a.m. - 2:45 p.m.IAD-YXU
8h 45m2 stops
C$ 882United Airlines
Find Deal
Sat, 20 Jul - Wed, 7 Aug

Flights from London to Washington, D.C. - Travel Insights & Trends

Get data-powered insights and trends into flights from London to Washington, D.C. to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from London to Washington Dulles Airport?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The cheapest return flight ticket from London to Washington Dulles Airport found by KAYAK users in the last 72 hours was for C$ 620 on Air Canada, followed by United Airlines (C$ 785). One-way flight deals have also been found from as low as C$ 318 on Air Canada and from C$ 609 on WestJet.

Good to know

Cheapest flight

C$ 318
Flight from London to Washington Dulles Airport

When to book flights from London to Washington, D.C.

Are your dates flexible? Find out the best times to travel from London to Washington, D.C. based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking London to Washington Dulles Airport flights

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

    In the last 3 days, the lowest price for a flight from London, Ontario to Washington, D.C. Dulles Intl Airport was C$ 232 for a one-way ticket and C$ 453 for a round-trip.

  • Which aircraft models fly most regularly from London to Washington Dulles Airport?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from London to Washington Dulles Airport?

    Star Alliance is the only airline alliance operating flights between London and Washington Dulles Airport.

  • How does KAYAK find such low prices on flights from London to Washington Dulles Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to Washington Dulles Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to Washington Dulles Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from London is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London to Washington Dulles Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Washington Dulles Airport with an airline and back to London with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to Washington Dulles Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington Dulles Airport from London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Book cheap flights from London to Washington, D.C.

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from London to Washington, D.C. found on KAYAK in the last 72 hours.
2/8Fri
1 stopAir Canada
5h 29mYXU-IAD
C$ 318
26/7Fri
1 stopWestJet
11h 31mYXU-IAD
C$ 609

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London - Washington Dulles Airport Flights

Departure:

London (undefined)Canada

Destination:

Washington Dulles Airport (IAD)United States

Return flight deals:

Washington Dulles Airport - London

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