C$ 205 Find Cheap Flights from London to Washington

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 departing on 19/5. 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.
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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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Flights Deals

Best Washington Flight Deals from London

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

Seattle
Seattle1 stopC$ 368
Seattle
Seattle1 stopC$ 368

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.
United Airlines Logo
6:15 a.m. - 10:45 a.m.YXU-SEA
7h 30m1 stop
United Airlines Logo
11:21 p.m. - 2:57 p.m.SEA-YXU
12h 36m2 stops
C$ 368United Airlines
Find Deal
lun., 19 may. - vie., 20 jun.
United Airlines Logo
6:15 a.m. - 10:51 a.m.YXU-SEA
7h 36m1 stop
United Airlines Logo
5:05 p.m. - 2:57 p.m.SEA-YXU
18h 52m2 stops
C$ 374United Airlines
Find Deal
jue., 12 jun. - jue., 19 jun.
United Airlines Logo
3:45 p.m. - 12:59 a.m.YXU-SEA
12h 14m2 stops
United Airlines Logo
5:26 p.m. - 2:57 p.m.SEA-YXU
18h 31m2 stops
C$ 382United Airlines
Find Deal
lun., 19 may. - vie., 20 jun.
United Airlines Logo
6:15 a.m. - 4:20 p.m.YXU-SEA
13h 05m2 stops
United Airlines Logo
5:05 p.m. - 2:57 p.m.SEA-YXU
18h 52m2 stops
C$ 455United Airlines
Find Deal
jue., 12 jun. - jue., 19 jun.
 Logo
6:00 a.m. - 12:58 p.m.YXU-SEA
9h 58m1 stop
 Logo
7:10 a.m. - 9:00 p.m.SEA-YXU
10h 50m1 stop
C$ 536
Find Deal
lun., 19 may. - vie., 20 jun.
 Logo
6:00 a.m. - 12:34 a.m.YXU-SEA
21h 34m2 stops
 Logo
7:05 a.m. - 5:14 a.m.SEA-YXU
19h 09m1 stop
C$ 574
Find Deal
vie., 27 jun. - dom., 6 jul.
WestJet Logo
8:00 p.m. - 12:58 p.m.YXU-SEA
19h 58m1 stop
WestJet Logo
7:05 a.m. - 5:14 a.m.SEA-YXU
19h 09m1 stop
C$ 723WestJet
Find Deal
vie., 27 jun. - dom., 6 jul.
United Airlines Logo
6:15 a.m. - 10:51 a.m.YXU-SEA
7h 36m1 stop
United Airlines Logo
11:35 a.m. - 9:27 p.m.SEA-YXU
6h 52m1 stop
C$ 790United Airlines
Find Deal
jue., 12 jun. - jue., 19 jun.
WestJet Logo
8:00 p.m. - 7:32 a.m.YXU-SEA
14h 32m2 stops
WestJet Logo
3:40 p.m. - 5:14 a.m.SEA-YXU
10h 34m2 stops
C$ 861WestJet
Find Deal
vie., 27 jun. - dom., 6 jul.
WestJet Logo
6:00 a.m. - 2:09 p.m.YXU-SEA
11h 09m2 stops
WestJet Logo
1:15 p.m. - 5:14 a.m.SEA-YXU
12h 59m3 stops
C$ 2,390WestJet
Find Deal
vie., 27 jun. - dom., 6 jul.
Useful Info

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.

Which airlines provide the cheapest flights from London to Washington?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from London to Washington were found on United Airlines (C$ 368) and WestJet (C$ 723).


Good to know

Low seasonMay
High seasonJuly
Cheapest flightC$ 205
Best time to beat the crowds (51% less expensive on average)
Most popular time to fly and prices are also 39% 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.

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

    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.

Top 3 airlines serving 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.
7.4
United AirlinesOverall score based on 8696 reviews
7.1Entertainment
8.1Crew
7.7Boarding
6.6Food
7.3Comfort
Airline reviews

Our flights got changed from United to Air Canada and our purchased seats did not get transferred so we had to pay for seats twice. I brought it up with Air Canada and they stated I had to go back and chase it with United. The united seats were $21 Canadian each and Air Canada were $56 each so we have paid $77 for each seat. Very unhappy

2.0 MediocreBrant, Apr 2025YHZ - EWR
Read more United Airlines reviews

Our flights got changed from United to Air Canada and our purchased seats did not get transferred so we had to pay for seats twice. I brought it up with Air Canada and they stated I had to go back and chase it with United. The united seats were $21 Canadian each and Air Canada were $56 each so we have paid $77 for each seat. Very unhappy

So far so good but food and entertainment are not available for this flight

leg space better than expected. two washrooms for one plane isn't enough.

Plane temperature was comfortable (not to hot) when boarding and waiting for takeoff.

Michael, our FA was very attentive, even finding me a chocolate brownie from economy class when the dessert selections were all dairy based. ( intolerant, not allergic so don’t usually need to order dairy free)

We tried to upgrade to economy premium but were told this was not possible as we had booked through United Airlines (and Air Canada was operating the flight). This seemed silly given there was ample space in economy premium. Additionally, we had to wait almost 1.5 hours upon arrival to taxi to the gate. Otherwise, the crew were very pleasant and passengers were friendly.

It was my first time with United Airlines and I would say it was very good experience and best of all the flights were on time. Will definitely fly with United Airlines next time.

headphone jack didnt work for the first flight and not much variety

The seats on this flight were almost roomy enough to be the basic amount needed for human existence. I think my favorite part of this flight was it landed at an A gate, which was the most palatial part of Sea-Tac I've ever seen - a massive improvement from the S gates.

The seats on this flight were almost roomy enough to be the basic amount needed for human existence.

Internet on both flights was sketchy. Thus in flight entertainment was non- existent on MN - Balrimote leg.

We never had an experience they canceled the flight and they did not offer us an alternative flight. I had to book one on my own expense. They offered us food voucher and we could not use them at the airport it kept saying not attached to an existing flight. The people at the counter were rude and cold and they did not care about our situation

It took 30 minutes to check in with the Westjet rep. They didn’t have enough seats and she needed to make a call… I am always “randomly” selected to be checked at security. Their “randomly “ selection system may need some updating. They treat people like criminals. It is not appropriate behavior.

Found the seats very crowded—too close together ! And waited a long time for our luggage All staff at both ends were excellent!!!

Flight cancelled and Kayak switched our return flight to a red eye. Ridiculous.

Will never book through you again. Very disappointed in the notices and action taken or provided when planes are rescheduled, enough to cause missed connections

Lost my luggage. Filed a report and there is no response. Received a phone call from another airline that said they had the bag and they did not know what to do with it

Very good over all , would have been nice to have entertainment on the flight

Absolutely the worst airline I have ever taken. They lost my baggage and told me my bag tags had been cancelled. When my bags arrived days later I had to pick them up at 3:15 am. My return flight was delayed another 6 hours and they broke my bag. Westjet does nothing to try and make it a better customer experience and all the customers services representatives I spoke with were useless and incompetent. Never flying westjet again.

Easy self checkin and baggage drop. No in seat entertainment, but wifi and app worked well

My flight got delayed 5 times and then got cancelled eventually, I had to get a hotel and uber and pay for food for an extra night without any plans. It was a horrible experience, instead of Air Canada, I was flying with United .

I had a nice flight with free wifi. So I was able to message family members and stream music during my flight, which made the trip go by fast. I also enjoyed flying on there Airbus A220. The plane looked very new and it also got up to speed fast down the runway and didn't need much runway to get airborne.

Overall good experience. The flight from Toronto to Denver does not have entertainment - movies to watch.

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

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

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