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C$ 388 Find Cheap Flights from London to Washington

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to Washington departing on 2/6. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Washington

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Washington, 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, as well as popular online travel agencies
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Best Washington Flight Deals from London

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Seattle
Seattle1 stopC$ 388

Cheap Flight Deals from London to Washington (YXU-USWA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from London to Washington 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.

Recent round-trip flight deals from London to Washington

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from London to Washington.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
6:00 a.m. - 12:58 p.m.YXU-SEA
9h 58m1 stop
7:35 p.m. - 5:14 a.m.SEA-YXU
6h 39m1 stop
C$ 388WestJet
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Mon, 2 Jun - Sun, 29 Jun
6:00 a.m. - 12:58 p.m.YXU-SEA
9h 58m1 stop
7:35 p.m. - 5:14 a.m.SEA-YXU
6h 39m1 stop
C$ 398WestJet
Find Deal
Fri, 30 May - Sun, 29 Jun
6:00 a.m. - 12:58 p.m.YXU-SEA
9h 58m1 stop
7:35 p.m. - 5:14 a.m.SEA-YXU
6h 39m1 stop
C$ 497Delta
Find Deal
Fri, 30 May - Wed, 2 Jul
6:00 a.m. - 12:58 p.m.YXU-SEA
9h 58m1 stop
1:35 p.m. - 5:14 a.m.SEA-YXU
12h 39m2 stops
C$ 612
Find Deal
Fri, 30 May - Sat, 28 Jun
6:00 a.m. - 12:58 p.m.YXU-SEA
9h 58m1 stop
1:30 p.m. - 5:14 a.m.SEA-YXU
12h 44m2 stops
C$ 626Delta
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Sat, 31 May - Sat, 28 Jun
12:20 p.m. - 9:35 a.m.YXU-SEA
24h 15m2 stops
7:05 a.m. - 5:14 a.m.SEA-YXU
19h 09m1 stop
C$ 656
Find Deal
Mon, 7 Apr - Thu, 1 May
6:15 a.m. - 1:01 p.m.YXU-SEA
9h 46m2 stops
7:15 p.m. - 9:17 a.m.SEA-YXU
11h 02m2 stops
C$ 705Air Canada
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Tue, 1 Jul - Wed, 30 Jul
6:15 a.m. - 10:16 p.m.YXU-SEA
19h 01m2 stops
7:15 p.m. - 9:17 a.m.SEA-YXU
11h 02m2 stops
C$ 748Air Canada
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Sun, 29 Jun - Tue, 29 Jul
3:35 p.m. - 9:11 p.m.YXU-SEA
32h 36m3 stops
7:00 p.m. - 5:07 p.m.SEA-YXU
19h 07m2 stops
C$ 798United Airlines
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Mon, 2 Jun - Mon, 30 Jun
6:15 a.m. - 9:31 p.m.YXU-SEA
18h 16m3 stops
2:50 p.m. - 9:18 a.m.SEA-YXU
15h 28m2 stops
C$ 838United Airlines
Find Deal
Tue, 6 May - Fri, 30 May

KAYAK's insights & trends for London to Washington flights

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

What is the cheapest time of day to fly to Washington?

The average price for all round-trip flights from London to Washington depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.
The cheapest time of day to fly to Washington is generally in the evening, when round-trip flights cost C$ 403 on average. Morning departures are around 1% more expensive than evening flights, on average. The most expensive time of day to fly to Washington is generally in the morning, which is peak travel time and where the average cost of a ticket is C$ 409.
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Good to know

Low season

September

High season

August

Cheapest flight

C$ 388
Best time to beat the crowds (45% less expensive on average)
Most popular time to fly and prices are also 37% lower on average.
Flight from London to Seattle

FAQs - booking Washington flights

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

    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.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from London to Washington 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?

    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 from London to Washington with an airline and back with another airline.

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

    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 from London to Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top airline flying from London to Washington

 
See real verified KAYAK customer reviews for airlines flying from London to Washington. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from London to Washington? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.0
Air CanadaOverall score based on 8981 reviews
6.8Entertainment
7.0Comfort
6.2Food
7.3Boarding
7.8Crew
Airline reviews

Boarding was challenging as we had to use the stairs from the tarmac. Stairs are okay but a roller bag makes it challenging.

8.0 ExcellentJanette, Mar 2025YVR - SEA
Read more Air Canada reviews

Boarding was challenging as we had to use the stairs from the tarmac. Stairs are okay but a roller bag makes it challenging.

Ensure prepaid food arrangements are appropriately understood by flight crew of who purchased and who did not

All was fine. Weather was a bit stormy, but nothing kayak can do about that! 😊

I paid for a comfort class seat and was seated in economy.

My plane was cancelled and had to be rebook for the evening was not happy.

The flight was cancelled and we had to rebook on Porter to make our cruise the next day. Air Canada has not compensated. We won’t be flying with them again. This is the second time this has happened. Also the return flight was delayed 2 hours who knows why.

Separated me and my wife and wife’s sister in far apart different seats even though I booked them all together. Just scams after scams to make us pay more. Worst airline

If you want your flight to get delayed constantly for 13+ hours and given a 10 dollar food voucher the. I would say take air canada. Worst experience ever.

My flight was cancelled and I was left to figure out where to find a hotel, something to eat and how to get a new flight at 11:30pm. Wasted a day. Thanks, Air Canada!

flight was delayed 6 hours for weather, then cancelled because of the crash in toronto, but none of the links to cancel or rebook my flights are working

Everything you need to know for your flight from London to Washington

Information on your arrival and departure airports

London (YXU)

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