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Cheap flights from Washington to London, ON from C$ 276

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 28/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YXU
14 Aug — 21 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Washington to London

Enter your travel dates to find the best prices.

Cheapest flights from Washington to London
Explore the most affordable flight options available from Washington to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 July 2026.

Sat 15/87:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Sat 29/86:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Deal found 14/7C$ 600
Mon 17/87:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Wed 19/85:55 p.m.
YXU
-
SEA
1 stop30h 05m
WestJet
Deal found 12/7C$ 706
Fri 30/108:05 a.m.
SEA
-
YXU
1 stop8h 10m
Multiple Airlines
Sun 8/118:00 p.m.
YXU
-
SEA
1 stop20h 20m
Multiple Airlines
Deal found 11/7C$ 793
Mon 17/88:00 a.m.
SEA
-
YXU
1 stop6h 42m
Air Canada
Wed 19/85:40 a.m.
YXU
-
SEA
2 stops11h 42m
Air Canada
Deal found 10/7C$ 885
Fri 30/108:40 a.m.
SEA
-
YXU
2 stops10h 12m
Air Canada
Sun 8/115:30 a.m.
YXU
-
SEA
2 stops12h 07m
Air Canada
Deal found 11/7C$ 892

Find flight deals from Washington to London

Keep the following information in mind while searching for Washington to London flight deals. Data was last updated 15 July 2026.

Round-trip from

C$ 600

One-way from

C$ 276
WestJet
  • WestJet
  • 15/8-29/8
  • 2 total stops
  • 22h 20m total
  • Washington to London
Search Deals
WestJet
  • WestJet
  • 28/8
  • 1 total stop
  • 6h 45m total
  • Washington to London
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to London 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 Washington to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sat 15/8

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

1 stop6h 45m

London

Sat 29/8

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

1 stop15h 35m

C$ 600

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sat 15/8

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

1 stop6h 45m

London

Sat 29/8

6:10 a.m.-8:32 p.m.

2 stops17h 22m

C$ 700

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 17/8

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

1 stop6h 45m

London

Wed 19/8

5:55 p.m.-9:00 p.m.

1 stop30h 05m

C$ 706

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 30/10

8:40 a.m.-9:52 p.m.

2 stops10h 12m

London

Sun 8/11

3:25 p.m.-8:59 p.m.

1 stop8h 34m

C$ 885
Quickest round-trip

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 17/8

8:00 a.m.-5:42 p.m.

1 stop6h 42m

London

Wed 19/8

5:40 a.m.-2:22 p.m.

2 stops11h 42m

C$ 885
Cheapest one-way
Quickest one-way

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 28/8

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

1 stop6h 45m

C$ 276

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 28/8

5:50 a.m.-5:42 p.m.

2 stops8h 52m

C$ 409

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/7

Sorted by cheapest first

Best time to book a flight from Washington to London

Have a flexible travel schedule? Discover the best time to fly to London from Washington 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 Washington to London
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Washington to London. 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 into for flights to London from Washington?

    For a flight from Washington to London, you will be flying into London. London (YXU) is just 8.6 km from the centre of the city.

  • How long is the flight from State of Washington to London, Ontario?

    There are many flights that can get you from State of Washington to London, Ontario in 6h 45m. Fly via WestJet to get the fastest option. The distance between State of Washington and London, Ontario is about 3219 km.

  • Can I find deals for flights from Washington to London that include hotel bookings?

    Yes. In addition to deals on Washington to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to London.

  • Can I find deals for business class flights from Washington to London?

    Yes. Cheapflights offers flight deals from Washington to London 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

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Grand Bend
Port Stanley

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Alternative routes for Washington to London

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