What is the cheapest airline that flies from Washington to London?

WestJet and Air Canada are the most popular carriers operating from Washington to London

How long does it take to fly to London, Ontario?

The average flight duration from State of Washington to London, Ontario depends on which airport you fly into and out of. Flying from Seattle to Toronto Pearson Intl Airport is 4h 39m on average, while flying from Spokane to Toronto Pearson Intl Airport is 6h 21m on average. Toronto Pearson Intl Airport is the most popular airport in London, Ontario.

Which airlines fly to London, Ontario?

Alaska Airlines, WestJet and Air Canada are the top three most popular airlines that fly to London, Ontario from State of Washington according to our data. Alaska Airlines is the first choice among our users, with 48% of people opting to fly with this airline when travelling to London, Ontario. Keep in mind that there are 3 different airlines that fly to London, Ontario on a routine basis, so you have a few additional options to choose from.

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.

C$ 316 Cheap Flights from Washington to London, Ontario in 2026

Find the cheapest flights from Washington to London

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:35 p.m. - 5:20 a.m.SEA Seattle/Tacoma Intl-YXU London

6h 45m1 stop Calgary

6:10 a.m. - 6:45 p.m.YXU London-SEA Seattle/Tacoma Intl

15h 35m1 stop Calgary

C$ 638WestJet

Thu, 24 Sep - Thu, 1 Oct

7:35 p.m. - 5:20 a.m.SEA Seattle/Tacoma Intl-YXU London

6h 45m1 stop Calgary

6:10 a.m. - 6:45 p.m.YXU London-SEA Seattle/Tacoma Intl

15h 35m1 stop Calgary

C$ 712WestJet

Sat, 26 Sep - Sat, 3 Oct

7:35 p.m. - 5:20 a.m.SEA Seattle/Tacoma Intl-YXU London

6h 45m1 stop Calgary

5:55 p.m. - 9:42 a.m.YXU London-SEA Seattle/Tacoma Intl

42h 47m2 stops Calgary Las Vegas Harry Reid Intl

C$ 802Multiple Airlines

Thu, 24 Sep - Thu, 1 Oct

7:35 p.m. - 5:20 a.m.SEA Seattle/Tacoma Intl-YXU London

6h 45m1 stop Calgary

5:55 p.m. - 6:45 p.m.YXU London-SEA Seattle/Tacoma Intl

27h 50m1 stop Calgary

C$ 818WestJet

Thu, 1 Oct - Mon, 5 Oct

7:35 p.m. - 5:20 a.m.SEA Seattle/Tacoma Intl-YXU London

6h 45m1 stop Calgary

5:55 p.m. - 6:45 p.m.YXU London-SEA Seattle/Tacoma Intl

27h 50m1 stop Calgary

C$ 819WestJet

Thu, 1 Oct - Mon, 5 Oct

7:35 p.m. - 5:20 a.m.SEA Seattle/Tacoma Intl-YXU London

6h 45m1 stop Calgary

5:55 p.m. - 9:40 a.m.YXU London-SEA Seattle/Tacoma Intl

18h 45m1 stop Calgary

C$ 833WestJet

Wed, 7 Oct - Sun, 11 Oct

7:35 p.m. - 5:20 a.m.SEA Seattle/Tacoma Intl-YXU London

6h 45m1 stop Calgary

6:10 a.m. - 6:45 p.m.YXU London-SEA Seattle/Tacoma Intl

15h 35m1 stop Calgary

C$ 834WestJet

Wed, 7 Oct - Sun, 11 Oct

8:00 a.m. - 5:43 p.m.SEA Seattle/Tacoma Intl-YXU London

6h 43m1 stop Toronto Pearson Intl

10:05 a.m. - 6:32 p.m.YXU London-SEA Seattle/Tacoma Intl

11h 27m2 stops Toronto Pearson Intl Vancouver Intl

C$ 879Air Canada

Sat, 26 Sep - Sat, 3 Oct

7:15 p.m. - 9:20 a.m.SEA Seattle/Tacoma Intl-YXU London

11h 05m2 stops Vancouver Intl Toronto Pearson Intl

10:05 a.m. - 6:32 p.m.YXU London-SEA Seattle/Tacoma Intl

11h 27m2 stops Toronto Pearson Intl Vancouver Intl

C$ 886Air Canada

Thu, 24 Sep - Thu, 1 Oct

7:15 p.m. - 5:43 p.m.SEA Seattle/Tacoma Intl-YXU London

19h 28m2 stops Vancouver Intl Toronto Pearson Intl

5:40 a.m. - 2:22 p.m.YXU London-SEA Seattle/Tacoma Intl

11h 42m2 stops Toronto Pearson Intl Vancouver Intl

C$ 912Air Canada

Sat, 26 Sep - Sat, 3 Oct

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WestJet flights from State of Washington to London, Ontario

Our best WestJet deals on State of Washington to London, Ontario flight tickets

WestJet

24 Sep

SEA7:35 p.m.Seattle/Tacoma Intl

6h 45m

1 stop

YXU5:20 a.m.London

1 Oct

YXU6:10 a.m.London

15h 35m

1 stop

SEA6:45 p.m.Seattle/Tacoma Intl

C$ 638

WestJet

26 Sep

SEA7:35 p.m.Seattle/Tacoma Intl

6h 45m

1 stop

YXU5:20 a.m.London

3 Oct

YXU6:10 a.m.London

15h 35m

1 stop

SEA6:45 p.m.Seattle/Tacoma Intl

C$ 712

WestJet

1 Oct

SEA7:35 p.m.Seattle/Tacoma Intl

6h 45m

1 stop

YXU5:20 a.m.London

5 Oct

YXU5:55 p.m.London

27h 50m

1 stop

SEA6:45 p.m.Seattle/Tacoma Intl

C$ 818

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 Sep

SEA8:00 a.m.Seattle/Tacoma Intl

6h 43m

1 stop

YXU5:43 p.m.London

3 Oct

YXU10:05 a.m.London

11h 27m

2 stops

SEA6:32 p.m.Seattle/Tacoma Intl

C$ 879

Air Canada

24 Sep

SEA7:15 p.m.Seattle/Tacoma Intl

11h 05m

2 stops

YXU9:20 a.m.London

1 Oct

YXU10:05 a.m.London

11h 27m

2 stops

SEA6:32 p.m.Seattle/Tacoma Intl

C$ 886

Air Canada

26 Sep

SEA7:15 p.m.Seattle/Tacoma Intl

19h 28m

2 stops

YXU5:43 p.m.London

3 Oct

YXU5:40 a.m.London

11h 42m

2 stops

SEA2:22 p.m.Seattle/Tacoma Intl

C$ 912

momondo Fare Finder

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

Cheapest round-trip

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Thu 24/9

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

1 stop6h 45m

London

Thu 1/10

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

1 stop15h 35m

C$ 638

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Sat 26/9

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

1 stop6h 45m

London

Sat 3/10

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

1 stop15h 35m

C$ 712

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Thu 24/9

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

1 stop6h 45m

London

Thu 1/10

5:55 p.m.-9:42 a.m.

2 stops42h 47m

C$ 802

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Thu 1/10

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

1 stop6h 45m

London

Mon 5/10

5:55 p.m.-6:45 p.m.

1 stop27h 50m

C$ 818

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Thu 1/10

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

1 stop6h 45m

London

Mon 5/10

5:55 p.m.-6:45 p.m.

1 stop27h 50m

C$ 819

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Wed 7/10

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

1 stop6h 45m

London

Sun 11/10

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

1 stop18h 45m

C$ 833

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Wed 7/10

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

1 stop6h 45m

London

Sun 11/10

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

1 stop15h 35m

C$ 834

Quickest round-trip

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Sat 26/9

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

1 stop6h 43m

London

Sat 3/10

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

2 stops11h 27m

C$ 879

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Thu 24/9

7:15 p.m.-9:20 a.m.

2 stops11h 05m

London

Thu 1/10

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

2 stops11h 27m

C$ 886

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Sat 26/9

7:15 p.m.-5:43 p.m.

2 stops19h 28m

London

Sat 3/10

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

2 stops11h 42m

C$ 912

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

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

You could potentially save up to 59% 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	15h 50m
Direct flights	None

The fastest flight from State of Washington to London, Ontario takes 15h 50m

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

Frequently asked questions about flying from Washington to London, Ontario

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.

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.