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Cheap flights from London, ON to Washington from C$ 368

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 1/6. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SEA
19 May — 26 May1
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 19 April 2026.

Tue 2/65:55 p.m.
YXU
-
SEA
1 stop27h 50m
WestJet
Tue 9/67:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 18/4C$ 513
Tue 9/65:55 p.m.
YXU
-
SEA
1 stop18h 45m
WestJet
Sat 13/67:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Deal found 15/4C$ 541
Sat 30/55:55 p.m.
YXU
-
SEA
1 stop18h 45m
WestJet
Sat 6/610:30 a.m.
SEA
-
YXU
1 stop15h 50m
WestJet
Deal found 15/4C$ 645
Sun 31/55:55 p.m.
YXU
-
PDX
1 stop22h 55m
WestJet
Thu 4/62:30 p.m.
PDX
-
YXU
1 stop11h 50m
WestJet
Deal found 17/4C$ 767
Sun 31/55:10 a.m.
YXU
-
PDX
2 stops13h 46m
United Airlines
Thu 4/610:40 p.m.
PDX
-
YXU
2 stops13h 18m
United Airlines
Deal found 14/4C$ 850

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 19 April 2026.

Round-trip from

C$ 513

One-way from

C$ 368
WestJet
  • WestJet
  • 2/6-9/6
  • 2 total stops
  • 34h 35m total
  • London to Washington
Search Deals
WestJet
  • WestJet
  • 1/6
  • 1 total stop
  • 10h 40m 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 19 April 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

Tue 9/6

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

1 stop15h 35m

Seattle/Tacoma Intl

Sat 13/6

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

1 stop6h 45m

C$ 541

LondonSeattle

YXU - SEA

YXUSEA

London

Tue 2/6

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

2 stops22h 00m

Seattle/Tacoma Intl

Tue 9/6

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

1 stop6h 45m

C$ 672

LondonSeattle

YXU - SEA

YXUSEA

London

Tue 2/6

5:10 a.m.-7:06 p.m.

2 stops16h 56m

Seattle/Tacoma Intl

Tue 9/6

11:52 p.m.-2:58 p.m.

2 stops12h 06m

C$ 712

LondonSeattle

YXU - SEA

YXUSEA

London

Tue 9/6

9:30 a.m.-7:06 p.m.

2 stops12h 36m

Seattle/Tacoma Intl

Sat 13/6

11:52 p.m.-2:58 p.m.

2 stops12h 06m

C$ 712

LondonSeattle

YXU - SEA

YXUSEA

London

Sat 30/5

5:10 a.m.-8:53 p.m.

2 stops18h 43m

Seattle/Tacoma Intl

Sat 6/6

10:40 p.m.-2:58 p.m.

2 stops13h 18m

C$ 757

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 28/5

9:30 a.m.-9:08 p.m.

1 stop14h 38m

Seattle/Tacoma Intl

Tue 2/6

3:00 p.m.-8:53 a.m.

2 stops14h 53m

C$ 758

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 28/5

9:30 a.m.-10:08 p.m.

3 stops15h 38m

Seattle/Tacoma Intl

Tue 2/6

10:40 p.m.-2:58 p.m.

2 stops13h 18m

C$ 758

LondonPortland

YXU - PDX

YXUPDX

London

Sun 31/5

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

1 stop22h 55m

Portland

Thu 4/6

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

1 stop11h 50m

C$ 767

LondonPortland

YXU - PDX

YXUPDX

London

Sun 31/5

5:10 a.m.-3:56 p.m.

2 stops13h 46m

Portland

Thu 4/6

10:40 p.m.-2:58 p.m.

2 stops13h 18m

C$ 850
Cheapest one-way
Quickest one-way

LondonPortland

YXU - PDX

YXUPDX

London

Mon 1/6

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

1 stop10h 40m

C$ 368

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/4

Showing 1-10 of 14 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 19 April 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
3,322 reviews
Check prices

Crew

7.9

Food

6.2

Entertainment

6.1

Comfort

7.0

Boarding

7.4

Overall

7.2

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
3,322 reviews
WestJet
7.2
Good
3,322 reviews
Check prices

Crew

7.9

Food

6.2

Entertainment

6.1

Comfort

7.0

Boarding

7.4

Overall

7.2

Reviews

1 / 20
6.0
Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight
Air Canada
7.1
Good
10,939 reviews
WestJet
7.2
Good
3,322 reviews
Check prices

Crew

7.9

Food

6.2

Entertainment

6.1

Comfort

7.0

Boarding

7.4

Overall

7.2

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$ 850, WestJet can have you in State of Washington from London, Ontario in 13h 46m. 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 3 airlines flying from London to Washington

Discover the top 3 airlines 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 19 April 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 240AverageC$ 411FlexibilityNo cancel feeOn-time60%
Search WestJet flights
United AirlinesCheapestC$ 275AverageC$ 292FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 365AverageC$ 414FlexibilityNo cancel feeOn-time67%
Search Air Canada 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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