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Cheap flights from Washington to London from C$ 426

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to London departing on 26/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
5:45 a.m. - 9:21 p.m.
SEA
-
YXU
12h 36m
2 stops
Air Canada Logo
5:40 p.m. - 10:16 p.m.
YXU
-
SEA
7h 36m
1 stop
C$ 426Air Canada
Thu, 26 Feb - Sat, 28 Feb
Air Canada Logo
5:45 a.m. - 9:21 p.m.
SEA
-
YXU
12h 36m
2 stops
Air Canada Logo
9:25 a.m. - 7:16 p.m.
YXU
-
SEA
12h 51m
2 stops
C$ 433Air Canada
Thu, 26 Feb - Sat, 28 Feb
Air Canada Logo
8:00 a.m. - 9:21 p.m.
SEA
-
YXU
10h 21m
1 stop
Air Canada Logo
5:40 p.m. - 10:16 p.m.
YXU
-
SEA
7h 36m
1 stop
C$ 452Air Canada
Thu, 26 Feb - Sat, 28 Feb
Air Canada Logo
5:40 a.m. - 9:21 p.m.
SEA
-
YXU
12h 41m
2 stops
Air Canada Logo
5:10 a.m. - 3:03 p.m.
YXU
-
SEA
12h 53m
2 stops
C$ 668Air Canada
Wed, 25 Mar - Wed, 1 Apr
Air Canada Logo
5:40 a.m. - 9:21 p.m.
SEA
-
YXU
12h 41m
2 stops
Air Canada Logo
9:40 a.m. - 9:53 p.m.
YXU
-
SEA
15h 13m
1 stop
C$ 694Air Canada
Wed, 25 Mar - Wed, 1 Apr
Multiple Airlines Logo
3:10 p.m. - 6:35 a.m.
SEA
-
YXU
12h 25m
1 stop
Multiple Airlines Logo
8:10 p.m. - 7:51 p.m.
YXU
-
SEA
26h 41m
1 stop
C$ 704Multiple Airlines
Wed, 25 Mar - Wed, 1 Apr
United Airlines Logo
11:59 p.m. - 5:05 p.m.
SEA
-
YXU
14h 06m
2 stops
United Airlines Logo
9:40 a.m. - 7:00 p.m.
YXU
-
SEA
12h 20m
2 stops
C$ 805United Airlines
Wed, 25 Mar - Wed, 1 Apr
United Airlines Logo
11:59 p.m. - 5:05 p.m.
SEA
-
YXU
14h 06m
2 stops
United Airlines Logo
9:40 a.m. - 9:53 p.m.
YXU
-
SEA
15h 13m
1 stop
C$ 819United Airlines
Wed, 25 Mar - Wed, 1 Apr
Air Canada Logo
5:45 a.m. - 9:21 p.m.
SEA
-
YXU
12h 36m
2 stops
Air Canada Logo
5:40 p.m. - 10:16 p.m.
YXU
-
SEA
7h 36m
1 stop
C$ 827Air Canada
Thu, 26 Feb - Sat, 28 Feb
Air Canada Logo
5:45 a.m. - 9:21 p.m.
SEA
-
YXU
12h 36m
2 stops
Air Canada Logo
5:10 a.m. - 2:31 p.m.
YXU
-
SEA
12h 21m
2 stops
C$ 834Air Canada
Thu, 26 Feb - Sat, 28 Feb

United Airlines flights from State of Washington to London, Ontario

Our best United Airlines deals on State of Washington to London, Ontario flight tickets
United Airlines
25 Mar
SEA11:59 p.m.Seattle/Tacoma Intl
14h 06m
2 stops
YXU5:05 p.m.London
1 Apr
YXU9:40 a.m.London
12h 20m
2 stops
SEA7:00 p.m.Seattle/Tacoma Intl
C$ 805
United Airlines
25 Mar
SEA11:59 p.m.Seattle/Tacoma Intl
14h 06m
2 stops
YXU5:05 p.m.London
1 Apr
YXU9:40 a.m.London
15h 13m
1 stop
SEA9:53 p.m.Seattle/Tacoma Intl
C$ 819
United Airlines
26 Feb
SEA5:00 a.m.Seattle/Tacoma Intl
13h 21m
2 stops
YXU9:21 p.m.London
28 Feb
YXU5:10 a.m.London
15h 53m
3 stops
SEA6:03 p.m.Seattle/Tacoma Intl
C$ 1,022

Air Canada flights from State of Washington to London, Ontario

Our best Air Canada deals on State of Washington to London, Ontario flight tickets
Air Canada
26 Feb
SEA5:45 a.m.Seattle/Tacoma Intl
12h 36m
2 stops
YXU9:21 p.m.London
28 Feb
YXU5:40 p.m.London
7h 36m
1 stop
SEA10:16 p.m.Seattle/Tacoma Intl
C$ 426
Air Canada
26 Feb
SEA5:45 a.m.Seattle/Tacoma Intl
12h 36m
2 stops
YXU9:21 p.m.London
28 Feb
YXU9:25 a.m.London
12h 51m
2 stops
SEA7:16 p.m.Seattle/Tacoma Intl
C$ 433
Air Canada
26 Feb
SEA8:00 a.m.Seattle/Tacoma Intl
10h 21m
1 stop
YXU9:21 p.m.London
28 Feb
YXU5:40 p.m.London
7h 36m
1 stop
SEA10:16 p.m.Seattle/Tacoma Intl
C$ 452

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington to London, Ontario 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, momondo users made 96,600 searches. Data last updated 8 February 2026.
Use the filters below to find and compare flights from Washington to London, Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 26/2

5:45 a.m.-9:21 p.m.

2 stops12h 36m

London

Sat 28/2

5:40 p.m.-10:16 p.m.

1 stop7h 36m

C$ 426

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 26/2

5:45 a.m.-9:21 p.m.

2 stops12h 36m

London

Sat 28/2

9:25 a.m.-7:16 p.m.

2 stops12h 51m

C$ 433

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 26/2

8:00 a.m.-9:21 p.m.

1 stop10h 21m

London

Sat 28/2

5:40 p.m.-10:16 p.m.

1 stop7h 36m

C$ 452

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Wed 25/3

5:40 a.m.-9:21 p.m.

2 stops12h 41m

London

Wed 1/4

5:10 a.m.-3:03 p.m.

2 stops12h 53m

C$ 668

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Wed 25/3

5:40 a.m.-9:21 p.m.

2 stops12h 41m

London

Wed 1/4

9:40 a.m.-9:53 p.m.

1 stop15h 13m

C$ 694

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Wed 25/3

3:10 p.m.-6:35 a.m.

1 stop12h 25m

London

Wed 1/4

8:10 p.m.-7:51 p.m.

1 stop26h 41m

C$ 704

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Wed 25/3

11:59 p.m.-5:05 p.m.

2 stops14h 06m

London

Wed 1/4

9:40 a.m.-7:00 p.m.

2 stops12h 20m

C$ 805

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Wed 25/3

11:59 p.m.-5:05 p.m.

2 stops14h 06m

London

Wed 1/4

9:40 a.m.-9:53 p.m.

1 stop15h 13m

C$ 819

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 26/2

5:45 a.m.-9:21 p.m.

2 stops12h 36m

London

Sat 28/2

5:40 p.m.-10:16 p.m.

1 stop7h 36m

C$ 827

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 26/2

5:45 a.m.-9:21 p.m.

2 stops12h 36m

London

Sat 28/2

5:10 a.m.-2:31 p.m.

2 stops12h 21m

C$ 834

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to London from

How to get the cheapest flight ticket from State of Washington to London, Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Can stopping save me money on State of Washington to London, Ontario flights?

You could potentially save up to 76% on your flight if you consider stops on a State of Washington to London, Ontario flight.

Cheap State of Washington to London, Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to London, Ontario

Fastest flight time

18h 03m

Direct flights

None
The fastest flight from State of Washington to London, Ontario takes 18h 03m
There are no direct flights from State of Washington to London, Ontario. There are no popular flight routes from State of Washington to London, Ontario.
Search flight deals

  • When did momondo last update prices for flights from Washington to London Airport?

    Prices for flights from Washington to London Airport refresh daily.

  • How old do you have to be to fly from Washington to London Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington to London Airport.

  • What documentation or ID do you need to fly to London Airport?

    The necessary travel and health documents for your London Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Travelling to a place near London?

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

Why use momondo?

Why should I use momondo to find a flight deal from Washington to London?

Finding the right flight to London from Washington is quick and easy when you have a range of options in front of you, from reputable agents and recognizable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

Can I find flights from Washington to London with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Washington to London flights to just show those with flexible booking policies.

How can momondo help me find flights from Washington to London?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Washington.

I’m not ready to book a flight from Washington to London right now. Can momondo alert me if prices change?

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Washington and alert you when they change.

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