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Cheap flights from London, ON to Washington from C$ 352

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/8. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SEA
23 Jun — 30 Jun1
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 24 May 2026.

Wed 26/85:55 p.m.
YXU
-
SEA
1 stop30h 05m
WestJet
Thu 3/97:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 21/5C$ 352
Mon 31/86:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Mon 7/97:00 a.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 21/5C$ 370
Mon 10/85:55 p.m.
YXU
-
PDX
1 stop22h 55m
WestJet
Wed 12/82:30 p.m.
PDX
-
YXU
1 stop26h 20m
WestJet
Deal found 21/5C$ 470
Mon 31/85:55 p.m.
YXU
-
SEA
1 stop18h 45m
WestJet
Wed 2/97:00 a.m.
SEA
-
YXU
1 stop19h 20m
WestJet
Deal found 21/5C$ 488
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 22/5C$ 652
Wed 4/113:25 p.m.
YXU
-
SEA
1 stop8h 29m
Air Canada
Wed 9/1210:10 a.m.
SEA
-
YXU
2 stops19h 56m
Air Canada
Deal found 23/5C$ 680
Mon 31/83:30 p.m.
YXU
-
SEA
2 stops10h 15m
United Airlines
Mon 7/911:59 p.m.
SEA
-
YXU
2 stops11h 56m
United Airlines
Deal found 21/5C$ 756
Mon 10/86:10 a.m.
YXU
-
PDX
1 stop10h 40m
Delta
Wed 12/85:54 p.m.
PDX
-
YXU
2 stops8h 26m
Delta
Deal found 21/5C$ 859
Mon 10/83:30 p.m.
YXU
-
PDX
2 stops21h 01m
Air Canada
Wed 12/87:45 p.m.
PDX
-
YXU
2 stops19h 00m
Air Canada
Deal found 22/5C$ 868
Mon 10/810:05 a.m.
YXU
-
PDX
2 stops13h 14m
United Airlines
Wed 12/811:02 p.m.
PDX
-
YXU
2 stops15h 43m
United Airlines
Deal found 23/5C$ 869

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 24 May 2026.

Round-trip from

C$ 352
WestJet
  • WestJet
  • 26/8-3/9
  • 2 total stops
  • 36h 50m 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 24 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

LondonSeattle

YXU - SEA

YXUSEA

London

Mon 31/8

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

1 stop15h 35m

Seattle/Tacoma Intl

Mon 7/9

7:00 a.m.-4:45 p.m.

1 stop6h 45m

C$ 370

LondonSeattle

YXU - SEA

YXUSEA

London

Mon 31/8

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

1 stop15h 35m

Seattle/Tacoma Intl

Wed 2/9

10:30 a.m.-4:45 p.m.

1 stop27h 15m

C$ 489

LondonSeattle

YXU - SEA

YXUSEA

London

Wed 4/11

5:45 a.m.-2:37 p.m.

2 stops11h 52m

Seattle/Tacoma Intl

Wed 9/12

10:10 a.m.-9:06 a.m.

2 stops19h 56m

C$ 680

LondonSeattle

YXU - SEA

YXUSEA

London

Mon 31/8

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

2 stops18h 47m

Seattle/Tacoma Intl

Wed 2/9

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

1 stop6h 45m

C$ 695

LondonSeattle

YXU - SEA

YXUSEA

London

Mon 31/8

3:30 p.m.-10:45 p.m.

2 stops10h 15m

Seattle/Tacoma Intl

Mon 7/9

11:59 p.m.-2:55 p.m.

2 stops11h 56m

C$ 756
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

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

2 stops9h 45m

C$ 760

LondonPortland

YXU - PDX

YXUPDX

London

Mon 10/8

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

1 stop10h 40m

Portland

Wed 12/8

5:54 p.m.-5:20 a.m.

2 stops8h 26m

C$ 861

LondonPortland

YXU - PDX

YXUPDX

London

Mon 10/8

3:30 p.m.-9:31 a.m.

2 stops21h 01m

Portland

Wed 12/8

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

2 stops19h 00m

C$ 868

LondonPortland

YXU - PDX

YXUPDX

London

Mon 10/8

10:05 a.m.-8:19 p.m.

2 stops13h 14m

Portland

Wed 12/8

11:02 p.m.-5:45 p.m.

2 stops15h 43m

C$ 869

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$ 1,005

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/5

Showing 1-10 of 12 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 24 May 2026.
Check out reviews from past customers who have flown with WestJet and Air Canada 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
3,345 reviews
Check prices

Food

6.2

Boarding

7.4

Crew

7.9

Overall

7.2

Comfort

7.0

Entertainment

6.1

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
3,345 reviews
WestJet
7.2
Good
3,345 reviews
Check prices

Food

6.2

Boarding

7.4

Crew

7.9

Overall

7.2

Comfort

7.0

Entertainment

6.1

Reviews

1 / 20
6.0
Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight
Air Canada
7.1
Good
11,078 reviews
WestJet
7.2
Good
3,345 reviews
Check prices

Food

6.2

Boarding

7.4

Crew

7.9

Overall

7.2

Comfort

7.0

Entertainment

6.1

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$ 861, WestJet can have you in State of Washington from London, Ontario in 10h 40m. 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 24 May 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 273AverageC$ 415FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

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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.

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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.

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