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Cheap flights from London, ON to Washington from C$ 318

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 13/8. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SEA
24 Aug — 31 Aug1
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 25 July 2026.

Sat 5/95:55 p.m.
YXU
-
SEA
1 stop27h 50m
WestJet
Wed 9/97:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 23/7C$ 489
Tue 25/88:40 p.m.
YXU
-
SEA
1 stop16h 00m
WestJet
Thu 10/97:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 23/7C$ 499
Thu 24/96:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Tue 29/97:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 24/7C$ 501
Thu 24/96:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Mon 28/97:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 24/7C$ 504
Sat 26/96:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Wed 30/97:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 22/7C$ 506
Fri 25/95:55 p.m.
YXU
-
SEA
1 stop27h 50m
WestJet
Wed 30/910:30 a.m.
SEA
-
YXU
1 stop27h 15m
WestJet
Deal found 22/7C$ 541
Thu 24/96:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Wed 30/910:30 a.m.
SEA
-
YXU
1 stop27h 15m
WestJet
Deal found 24/7C$ 546
Thu 13/85:55 p.m.
YXU
-
SEA
1 stop18h 45m
WestJet
Wed 19/810:30 a.m.
SEA
-
YXU
1 stop27h 15m
WestJet
Deal found 24/7C$ 556
Sat 17/106:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Wed 21/1010:30 a.m.
SEA
-
YXU
1 stop27h 15m
WestJet
Deal found 21/7C$ 599
Fri 14/82:40 p.m.
YXU
-
SEA
2 stops22h 00m
WestJet
Sun 23/87:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 25/7C$ 600
Fri 16/105:40 a.m.
YXU
-
PDX
2 stops21h 54m
United Airlines
Mon 19/105:30 a.m.
PDX
-
YXU
2 stops13h 10m
United Airlines
Deal found 24/7C$ 846
Fri 16/1010:05 a.m.
YXU
-
PDX
2 stops12h 01m
Air Canada
Mon 19/1010:10 a.m.
PDX
-
YXU
2 stops20h 10m
Air Canada
Deal found 20/7C$ 938

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 25 July 2026.

Round-trip from

C$ 489

One-way from

C$ 318
WestJet
  • WestJet
  • 5/9-9/9
  • 2 total stops
  • 34h 35m total
  • London to Washington
Search Deals
WestJet
  • WestJet
  • 13/8
  • 1 total stop
  • 16h 00m 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 25 July 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

Tue 25/8

8:40 p.m.-9:40 a.m.

1 stop16h 00m

Seattle/Tacoma Intl

Thu 10/9

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

1 stop6h 45m

C$ 499

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 24/9

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

1 stop15h 35m

Seattle/Tacoma Intl

Wed 30/9

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

1 stop27h 15m

C$ 546

LondonSeattle

YXU - SEA

YXUSEA

London

Sat 17/10

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

1 stop15h 35m

Seattle/Tacoma Intl

Wed 21/10

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

1 stop6h 45m

C$ 627

LondonSeattle

YXU - SEA

YXUSEA

London

Sat 17/10

6:10 a.m.-4:37 p.m.

2 stops13h 27m

Seattle/Tacoma Intl

Wed 21/10

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

1 stop6h 45m

C$ 711

LondonSeattle

YXU - SEA

YXUSEA

London

Sat 26/9

6:10 a.m.-7:39 p.m.

2 stops16h 29m

Seattle/Tacoma Intl

Tue 29/9

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

1 stop6h 45m

C$ 770

LondonSeattle

YXU - SEA

YXUSEA

London

Sat 17/10

10:05 a.m.-6:32 p.m.

2 stops11h 27m

Seattle/Tacoma Intl

Wed 21/10

5:40 a.m.-5:45 p.m.

2 stops9h 05m

C$ 789

LondonPortland

YXU - PDX

YXUPDX

London

Fri 16/10

5:40 a.m.-12:34 a.m.

2 stops21h 54m

Portland

Mon 19/10

5:30 a.m.-9:40 p.m.

2 stops13h 10m

C$ 846

LondonPortland

YXU - PDX

YXUPDX

London

Fri 16/10

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

2 stops12h 01m

Portland

Mon 19/10

10:10 a.m.-9:20 a.m.

2 stops20h 10m

C$ 938
Quickest round-trip

LondonPortland

YXU - PDX

YXUPDX

London

Fri 16/10

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

1 stop10h 40m

Portland

Mon 19/10

5:49 p.m.-5:20 a.m.

2 stops8h 31m

C$ 1,059
Cheapest one-way

LondonSeattle

YXU - SEA

YXUSEA

London

Tue 11/8

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

1 stop18h 45m

C$ 324

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/7

Showing 1-10 of 20 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 25 July 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
3,415 reviews
Check prices

Entertainment

6.1

Food

6.2

Crew

7.9

Boarding

7.4

Overall

7.2

Comfort

7.0

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
3,415 reviews
WestJet
7.2
Good
3,415 reviews
Check prices

Entertainment

6.1

Food

6.2

Crew

7.9

Boarding

7.4

Overall

7.2

Comfort

7.0

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$ 711, WestJet can have you in State of Washington from London, Ontario in 13h 27m. The distance between London, Ontario and State of Washington is about 3219 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

See prices for flight routes from nearby airports that may be better suited for you.
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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 25 July 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 277AverageC$ 423FlexibilityNo 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.

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?

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