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Cheap flights from London, ON to Washington from C$ 357

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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SEA
28 Jun — 5 Jul1
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 29 May 2026.

Thu 25/63:30 p.m.
YXU
-
SEA
1 stop8h 37m
Air Canada
Wed 1/78:00 a.m.
SEA
-
YXU
1 stop6h 42m
Air Canada
Deal found 25/5C$ 622
Mon 31/83:30 p.m.
YXU
-
SEA
1 stop8h 37m
Air Canada
Wed 2/98:00 a.m.
SEA
-
YXU
1 stop6h 45m
Air Canada
Deal found 28/5C$ 653
Tue 20/1010:05 a.m.
YXU
-
PDX
2 stops12h 01m
Air Canada
Wed 21/107:45 p.m.
PDX
-
YXU
2 stops19h 00m
Air Canada
Deal found 28/5C$ 761
Mon 31/85:40 a.m.
YXU
-
SEA
2 stops13h 27m
United Airlines
Wed 2/95:00 a.m.
SEA
-
YXU
2 stops9h 45m
United Airlines
Deal found 28/5C$ 765
Mon 10/86:20 p.m.
YXU
-
PDX
2 stops18h 11m
Air Canada
Wed 12/87:45 p.m.
PDX
-
YXU
2 stops19h 00m
Air Canada
Deal found 27/5C$ 834
Mon 10/85:55 p.m.
YXU
-
PDX
1 stop22h 55m
WestJet
Wed 12/82:30 p.m.
PDX
-
YXU
1 stop11h 50m
WestJet
Deal found 27/5C$ 907
Thu 25/610:05 a.m.
YXU
-
SEA
2 stops12h 01m
United Airlines
Wed 1/77:00 a.m.
SEA
-
YXU
2 stops11h 40m
United Airlines
Deal found 25/5C$ 924
Thu 25/65:55 p.m.
YXU
-
SEA
3 stops31h 47m
Multiple Airlines
Wed 1/77:20 p.m.
SEA
-
YXU
2 stops11h 00m
Multiple Airlines
Deal found 25/5C$ 955
Tue 26/55:55 p.m.
YXU
-
SEA
2 stops21h 43m
WestJet
Tue 2/67:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 24/5C$ 1,222
Tue 26/55:10 a.m.
YXU
-
SEA
2 stops16h 55m
United Airlines
Tue 2/67:00 a.m.
SEA
-
YXU
2 stops11h 38m
United Airlines
Deal found 24/5C$ 1,279

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 29 May 2026.

Round-trip from

C$ 622

One-way from

C$ 357
Air Canada
  • Air Canada
  • 25/6-1/7
  • 2 total stops
  • 15h 19m total
  • London to Washington
Search Deals
Air Canada
  • Air Canada
  • 9/7
  • 1 total stop
  • 8h 37m 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 29 May 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
Quickest round-trip

LondonSeattle

YXU - SEA

YXUSEA

London

Mon 31/8

3:30 p.m.-9:07 p.m.

1 stop8h 37m

Seattle/Tacoma Intl

Wed 2/9

8:00 a.m.-5:45 p.m.

1 stop6h 45m

C$ 653

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 25/6

3:30 p.m.-9:07 p.m.

1 stop8h 37m

Seattle/Tacoma Intl

Wed 1/7

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

2 stops11h 00m

C$ 701

LondonPortland

YXU - PDX

YXUPDX

London

Tue 20/10

10:05 a.m.-7:06 p.m.

2 stops12h 01m

Portland

Wed 21/10

7:45 p.m.-5:45 p.m.

2 stops19h 00m

C$ 761

LondonSeattle

YXU - SEA

YXUSEA

London

Mon 31/8

5:40 a.m.-4:07 p.m.

2 stops13h 27m

Seattle/Tacoma Intl

Wed 2/9

5:00 a.m.-5:45 p.m.

2 stops9h 45m

C$ 765

LondonPortland

YXU - PDX

YXUPDX

London

Mon 10/8

6:20 p.m.-9:31 a.m.

2 stops18h 11m

Portland

Wed 12/8

7:45 p.m.-5:45 p.m.

2 stops19h 00m

C$ 834

LondonPortland

YXU - PDX

YXUPDX

London

Mon 10/8

5:55 p.m.-1:50 p.m.

1 stop22h 55m

Portland

Wed 12/8

2:30 p.m.-5:20 a.m.

1 stop11h 50m

C$ 907

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 25/6

10:05 a.m.-7:06 p.m.

2 stops12h 01m

Seattle/Tacoma Intl

Wed 1/7

7:00 a.m.-9:40 p.m.

2 stops11h 40m

C$ 924

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 25/6

5:55 p.m.-10:42 p.m.

3 stops31h 47m

Seattle/Tacoma Intl

Wed 1/7

10:45 a.m.-5:20 a.m.

3 stops15h 35m

C$ 1,106
Cheapest one-way

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 9/7

6:20 p.m.-10:07 a.m.

2 stops18h 47m

C$ 400

LondonPortland

YXU - PDX

YXUPDX

London

Sun 14/6

6:10 p.m.-9:25 a.m.

2 stops18h 15m

C$ 469

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/5

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

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 29 May 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
3,349 reviews
Check prices

Boarding

7.4

Overall

7.2

Entertainment

6.1

Crew

7.9

Comfort

7.0

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
3,349 reviews
WestJet
7.2
Good
3,349 reviews
Check prices

Boarding

7.4

Overall

7.2

Entertainment

6.1

Crew

7.9

Comfort

7.0

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$ 653, Air Canada can have you in State of Washington from London, Ontario in 8h 37m. The distance between London, Ontario and State of Washington is about 3219 km.

  • 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 29 May 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 273AverageC$ 415FlexibilityNo 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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