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Cheap flights from London, ON to Washington from C$ 337

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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SEA
11 Sep — 18 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Washington

Enter your travel dates to find the best prices.

Cheapest flights from London to Washington
Explore the most affordable flight options available from London to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 August 2026.

Wed 9/96:10 a.m. -
1 stop15h 35m
Sat 12/97:35 p.m. -
1 stop6h 45m
Deal found 10/8C$ 549
Thu 10/95:55 p.m. -
1 stop18h 45m
Tue 15/97:35 p.m. -
1 stop6h 45m
Deal found 9/8C$ 560
Sat 29/86:10 a.m. -
1 stop10h 40m
Wed 2/92:30 p.m. -
1 stop11h 50m
Deal found 8/8C$ 575
Mon 19/105:55 p.m. -
1 stop27h 50m
Wed 28/103:10 p.m. -
1 stop25h 05m
Deal found 8/8C$ 593
Tue 1/128:00 p.m. -
1 stop20h 20m
Wed 9/123:10 p.m. -
1 stop24h 05m
Deal found 11/8C$ 648
Wed 21/106:10 a.m. -
1 stop15h 35m
Wed 25/113:10 p.m. -
1 stop24h 05m
Deal found 8/8C$ 649
Mon 30/118:00 p.m. -
1 stop20h 20m
Tue 8/123:10 p.m. -
1 stop24h 05m
Deal found 11/8C$ 652
Fri 25/95:55 p.m. -
1 stop27h 50m
Mon 28/97:35 p.m. -
1 stop6h 45m
Deal found 7/8C$ 673
Mon 19/103:30 p.m. -
1 stop8h 34m
Wed 28/108:40 a.m. -
2 stops10h 12m
Deal found 8/8C$ 678
Thu 10/95:55 p.m. -
1 stop18h 45m
Tue 15/98:15 p.m. -
2 stops30h 05m
Deal found 9/8C$ 684
Tue 1/125:30 a.m. -
2 stops12h 07m
Wed 9/127:05 p.m. -
2 stops10h 32m
Deal found 11/8C$ 688
Wed 21/105:40 a.m. -
2 stops11h 42m
Wed 25/118:40 a.m. -
2 stops10h 12m
Deal found 8/8C$ 691

Find flight deals from London to Washington

Keep the following information in mind while searching for London to Washington flight deals. Data was last updated 12 August 2026.

Round-trip from

C$ 549

One-way from

C$ 337
WestJet
  • WestJet
  • 9/9-12/9
  • 2 total stops
  • 22h 20m total
  • London to Washington
Search Deals
WestJet
  • WestJet
  • 12/9
  • 1 total stop
  • 15h 35m total
  • London to Washington
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from London to Washington 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 629,999 searches. Data last updated 12 August 2026.
Use the filters below to find and compare flights from London to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 9/9

6:10 a.m.-6:45 p.m.

1 stop15h 35m

Seattle/Tacoma Intl

Sat 12/9

7:35 p.m.-5:20 a.m.

1 stop6h 45m

C$ 549

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Fri 25/9

5:55 p.m.-6:45 p.m.

1 stop27h 50m

Seattle/Tacoma Intl

Mon 28/9

7:35 p.m.-5:20 a.m.

1 stop6h 45m

C$ 673

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Thu 10/9

5:55 p.m.-9:40 a.m.

1 stop18h 45m

Seattle/Tacoma Intl

Tue 15/9

8:15 p.m.-5:20 a.m.

2 stops30h 05m

C$ 684

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 9/9

6:10 a.m.-6:45 p.m.

1 stop15h 35m

Seattle/Tacoma Intl

Sat 12/9

9:45 p.m.-5:20 a.m.

2 stops28h 35m

C$ 688

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 18/11

9:15 a.m.-6:22 p.m.

2 stops12h 07m

Seattle/Tacoma Intl

Wed 30/12

8:15 a.m.-9:47 p.m.

2 stops10h 32m

C$ 759

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Thu 10/9

3:30 p.m.-10:47 p.m.

2 stops10h 17m

Seattle/Tacoma Intl

Tue 15/9

7:15 p.m.-9:20 a.m.

2 stops11h 05m

C$ 765

LondonPortland

YXU London - PDX Portland

YXUPDX

London

Sat 29/8

6:10 a.m.-1:50 p.m.

1 stop10h 40m

Portland

Wed 2/9

3:30 p.m.-5:20 a.m.

2 stops10h 50m

C$ 798
Quickest round-trip

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Fri 25/9

3:30 p.m.-9:04 p.m.

1 stop8h 34m

Seattle/Tacoma Intl

Mon 28/9

7:15 p.m.-9:20 a.m.

2 stops11h 05m

C$ 806

LondonPortland

YXU London - PDX Portland

YXUPDX

London

Fri 30/10

5:30 a.m.-2:41 p.m.

2 stops12h 11m

Portland

Sun 1/11

7:00 a.m.-9:52 p.m.

2 stops11h 52m

C$ 922

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 9/9

5:40 a.m.-7:08 p.m.

3 stops16h 28m

Seattle/Tacoma Intl

Sat 12/9

5:00 a.m.-5:43 p.m.

2 stops9h 43m

C$ 930

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/8

Showing 1-10 of 23 resultsSorted by cheapest first
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Best time to book a flight from London to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington 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

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington. Reviews last updated 12 August 2026.
Check out reviews from past customers who have flown with WestJet from London to Washington to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
WestJet
7.2
Good
3,431 reviews
Check prices

Entertainment

6.1

Boarding

7.4

Overall

7.2

Comfort

7.0

Crew

7.9

Food

6.2

Reviews

1 / 20
6.0
Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight
WestJet
7.2
Good
3,431 reviews
WestJet
7.2
Good
3,431 reviews
Check prices

Entertainment

6.1

Boarding

7.4

Overall

7.2

Comfort

7.0

Crew

7.9

Food

6.2

Reviews

1 / 20
6.0
Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight

Related info for your journey

Find useful and relevant information for your journey from London to Washington. 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?

    Most people fly from London (YXU) if they book a flight from London to Washington. London is conveniently located just 8.6 km from London’s city centre.

  • How long is the flight from London, Ontario to State of Washington?

    For as low as C$ 922, WestJet can have you in State of Washington from London, Ontario in 12h 11m. The distance between London, Ontario and State of Washington is about 3270 km. This flight may include one or multiple stops.

  • What are the most popular routes from London, Ontario to State of Washington?

    The most popular flight routes from London, Ontario to State of Washington are London - Seattle/Tacoma Intl, London - Portland and London - Wenatchee Pangborn Field.

  • Can I find deals for flights from London to Washington that include hotel bookings?

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

  • How can I find direct flights from London to Washington?

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

  • Can I find deals for business class flights from London to Washington?

    Yes. Cheapflights offers flight deals from London to Washington by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for London to Washington

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Top airline flying from London to Washington

Discover the top airline that operate flights from London to Washington. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 12 August 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 274AverageC$ 418FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from London to Washington?

Deals for London to Washington flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from London to Washington?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from London to Washington for you. Better yet — we are completely free to use.

Can Cheapflights find flights from London to Washington with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from London to Washington, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from London to Washington become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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