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Cheap flights from London, ON to Washington from C$ 313

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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SEA
14 Aug — 21 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 15 July 2026.

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 11/7C$ 569
Tue 11/85:55 p.m.
YXU
-
SEA
1 stop27h 50m
WestJet
Tue 18/87:00 a.m.
SEA
-
YXU
1 stop9h 50m
WestJet
Deal found 14/7C$ 571
Wed 2/96:10 a.m.
YXU
-
PDX
1 stop10h 40m
WestJet
Sun 6/92:30 p.m.
PDX
-
YXU
1 stop11h 50m
WestJet
Deal found 12/7C$ 574
Mon 24/86:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Thu 10/97:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 14/7C$ 614
Sat 12/96:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Wed 16/97:35 p.m.
SEA
-
YXU
1 stop18h 10m
WestJet
Deal found 13/7C$ 629
Sat 22/86:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Thu 10/97:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 14/7C$ 634
Sat 22/86:10 a.m.
YXU
-
SEA
1 stop17h 50m
WestJet
Sun 13/97:35 p.m.
SEA
-
YXU
1 stop18h 10m
WestJet
Deal found 14/7C$ 676
Sat 26/93:30 p.m.
YXU
-
SEA
2 stops10h 17m
Air Canada
Wed 30/98:00 a.m.
SEA
-
YXU
1 stop6h 43m
Air Canada
Deal found 10/7C$ 686
Wed 26/86:10 a.m.
YXU
-
SEA
2 stops28h 58m
Multiple Airlines
Tue 8/97:35 p.m.
SEA
-
YXU
1 stop6h 45m
Multiple Airlines
Deal found 14/7C$ 688
Wed 26/86:10 a.m.
YXU
-
SEA
2 stops28h 58m
Multiple Airlines
Wed 9/97:35 p.m.
SEA
-
YXU
1 stop6h 45m
Multiple Airlines
Deal found 14/7C$ 696
Wed 2/95:40 a.m.
YXU
-
PDX
2 stops12h 11m
Air Canada
Sun 6/97:45 p.m.
PDX
-
YXU
2 stops10h 35m
Air Canada
Deal found 12/7C$ 784
Fri 28/82:40 p.m.
YXU
-
PDX
3 stops27h 11m
Multiple Airlines
Tue 1/92:30 p.m.
PDX
-
YXU
1 stop11h 50m
Multiple Airlines
Deal found 14/7C$ 785

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 15 July 2026.

Round-trip from

C$ 569

One-way from

C$ 313
WestJet
  • WestJet
  • 26/9-30/9
  • 2 total stops
  • 22h 20m total
  • London to Washington
Search Deals
WestJet
  • WestJet
  • 10/8
  • 1 total stop
  • 17h 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 15 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

Sat 26/9

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

1 stop15h 35m

Seattle/Tacoma Intl

Wed 30/9

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

1 stop6h 45m

C$ 569

LondonSeattle

YXU - SEA

YXUSEA

London

Sat 12/9

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

1 stop15h 35m

Seattle/Tacoma Intl

Wed 16/9

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

1 stop6h 45m

C$ 571

LondonPortland

YXU - PDX

YXUPDX

London

Wed 2/9

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

1 stop10h 40m

Portland

Sun 6/9

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

1 stop11h 50m

C$ 574
Quickest round-trip

LondonSeattle

YXU - SEA

YXUSEA

London

Sat 26/9

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

2 stops10h 17m

Seattle/Tacoma Intl

Wed 30/9

8:00 a.m.-5:43 p.m.

1 stop6h 43m

C$ 686

LondonSeattle

YXU - SEA

YXUSEA

London

Sat 12/9

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

2 stops10h 17m

Seattle/Tacoma Intl

Wed 16/9

8:00 a.m.-5:43 p.m.

1 stop6h 43m

C$ 788

LondonPortland

YXU - PDX

YXUPDX

London

Fri 28/8

2:40 p.m.-9:31 a.m.

3 stops21h 51m

Portland

Tue 1/9

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

2 stops18h 00m

C$ 810

LondonPortland

YXU - PDX

YXUPDX

London

Fri 28/8

8:40 p.m.-1:50 p.m.

1 stop20h 10m

Portland

Tue 1/9

2:30 p.m.-4:45 p.m.

1 stop23h 15m

C$ 820

LondonSeattle

YXU - SEA

YXUSEA

London

Sat 22/8

6:10 a.m.-7:55 p.m.

2 stops16h 45m

Seattle/Tacoma Intl

Fri 11/9

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

1 stop6h 45m

C$ 827

LondonSeattle

YXU - SEA

YXUSEA

London

Mon 24/8

6:10 a.m.-11:19 p.m.

2 stops20h 09m

Seattle/Tacoma Intl

Fri 11/9

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

1 stop6h 45m

C$ 827

LondonPortland

YXU - PDX

YXUPDX

London

Wed 2/9

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

1 stop10h 40m

Portland

Sun 6/9

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

2 stops8h 26m

C$ 851

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/7

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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 15 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
3,410 reviews
Check prices

Boarding

7.4

Food

6.2

Overall

7.2

Comfort

7.0

Crew

7.9

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
3,410 reviews
WestJet
7.2
Good
3,410 reviews
Check prices

Boarding

7.4

Food

6.2

Overall

7.2

Comfort

7.0

Crew

7.9

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$ 686, WestJet can have you in State of Washington from London, Ontario in 10h 17m. 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 15 July 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 277AverageC$ 423FlexibilityNo 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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