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Cheap flights from London, Ontario to Seattle from C$ 265

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from London, Ontario to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
6:40 a.m. - 1:40 p.m.YXU  London-SEA Seattle/Tacoma Intl
10h 00m1 stop Calgary
WestJet Logo
2:30 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YXU London
12h 05m1 stop Calgary
C$ 527WestJet
Wed, 17 Feb - Wed, 24 Feb
WestJet Logo
6:10 a.m. - 6:45 p.m.YXU  London-SEA Seattle/Tacoma Intl
15h 35m1 stop Calgary
WestJet Logo
7:35 p.m. - 5:20 a.m.SEA  Seattle/Tacoma Intl-YXU London
6h 45m1 stop Calgary
C$ 606WestJet
Wed, 21 Oct - Thu, 22 Oct
WestJet Logo
6:10 a.m. - 6:45 p.m.YXU  London-SEA Seattle/Tacoma Intl
15h 35m1 stop Calgary
WestJet Logo
7:35 p.m. - 5:20 a.m.SEA  Seattle/Tacoma Intl-YXU London
6h 45m1 stop Calgary
C$ 608WestJet
Wed, 21 Oct - Thu, 22 Oct
WestJet Logo
6:40 a.m. - 1:40 p.m.YXU  London-SEA Seattle/Tacoma Intl
10h 00m1 stop Calgary
WestJet Logo
2:30 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YXU London
12h 05m1 stop Calgary
C$ 636WestJet
Wed, 17 Feb - Tue, 23 Feb
WestJet Logo
6:40 a.m. - 1:40 p.m.YXU  London-SEA Seattle/Tacoma Intl
10h 00m1 stop Calgary
WestJet Logo
2:30 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YXU London
12h 05m1 stop Calgary
C$ 636WestJet
Thu, 18 Feb - Tue, 23 Feb
WestJet Logo
6:40 a.m. - 1:40 p.m.YXU  London-SEA Seattle/Tacoma Intl
10h 00m1 stop Calgary
WestJet Logo
2:30 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YXU London
12h 05m1 stop Calgary
C$ 636WestJet
Tue, 16 Feb - Tue, 23 Feb
WestJet Logo
6:40 a.m. - 1:40 p.m.YXU  London-SEA Seattle/Tacoma Intl
10h 00m1 stop Calgary
WestJet Logo
2:30 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YXU London
12h 05m1 stop Calgary
C$ 636WestJet
Thu, 18 Feb - Wed, 24 Feb
WestJet Logo
6:40 a.m. - 1:40 p.m.YXU  London-SEA Seattle/Tacoma Intl
10h 00m1 stop Calgary
WestJet Logo
2:30 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YXU London
12h 05m1 stop Calgary
C$ 636WestJet
Tue, 16 Feb - Wed, 24 Feb
Multiple Airlines Logo
6:40 a.m. - 1:40 p.m.YXU  London-SEA Seattle/Tacoma Intl
10h 00m1 stop Calgary
Multiple Airlines Logo
11:31 a.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YXU London
15h 04m2 stops San Francisco Calgary
C$ 678Multiple Airlines
Wed, 17 Feb - Thu, 25 Feb
Multiple Airlines Logo
6:40 a.m. - 1:40 p.m.YXU  London-SEA Seattle/Tacoma Intl
10h 00m1 stop Calgary
Multiple Airlines Logo
11:31 a.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YXU London
15h 04m2 stops San Francisco Calgary
C$ 678Multiple Airlines
Thu, 18 Feb - Thu, 25 Feb

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United Airlines flights from London, Ontario to Seattle

Our best United Airlines deals on London, Ontario to Seattle flight tickets
United Airlines
23 Dec
YXU3:20 p.m.London
8h 39m
1 stop
SEA8:59 p.m.Seattle/Tacoma Intl
3 Jan
SEA11:44 p.m.Seattle/Tacoma Intl
19h 03m
2 stops
YXU9:47 p.m.London
C$ 996
United Airlines
23 Sep
YXU5:40 a.m.London
16h 28m
3 stops
SEA7:08 p.m.Seattle/Tacoma Intl
13 Oct
SEA8:25 a.m.Seattle/Tacoma Intl
10h 15m
2 stops
YXU9:40 p.m.London
C$ 1,003
United Airlines
23 Dec
YXU5:30 a.m.London
13h 49m
2 stops
SEA4:19 p.m.Seattle/Tacoma Intl
3 Jan
SEA11:44 p.m.Seattle/Tacoma Intl
19h 03m
2 stops
YXU9:47 p.m.London
C$ 1,029

Air Canada flights from London, Ontario to Seattle

Our best Air Canada deals on London, Ontario to Seattle flight tickets
Air Canada
15 Feb
YXU5:30 a.m.London
12h 07m
2 stops
SEA2:37 p.m.Seattle/Tacoma Intl
23 Feb
SEA8:15 a.m.Seattle/Tacoma Intl
10h 32m
2 stops
YXU9:47 p.m.London
C$ 753
Air Canada
21 Oct
YXU3:30 p.m.London
10h 17m
2 stops
SEA10:47 p.m.Seattle/Tacoma Intl
22 Oct
SEA5:50 a.m.Seattle/Tacoma Intl
10h 50m
2 stops
YXU7:40 p.m.London
C$ 781
Air Canada
21 Oct
YXU3:30 p.m.London
10h 17m
2 stops
SEA10:47 p.m.Seattle/Tacoma Intl
22 Oct
SEA7:15 p.m.Seattle/Tacoma Intl
10h 10m
2 stops
YXU8:25 a.m.London
C$ 782

momondo Fare Finder

 
Use the filters below to find and compare flights from London, Ontario to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 17/2

6:40 a.m.-1:40 p.m.

1 stop10h 00m

Seattle/Tacoma Intl

Wed 24/2

2:30 p.m.-5:35 a.m.

1 stop12h 05m

C$ 527

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 21/10

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

1 stop15h 35m

Seattle/Tacoma Intl

Thu 22/10

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

1 stop6h 45m

C$ 606

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 21/10

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

1 stop15h 35m

Seattle/Tacoma Intl

Thu 22/10

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

1 stop6h 45m

C$ 608

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 17/2

6:40 a.m.-1:40 p.m.

1 stop10h 00m

Seattle/Tacoma Intl

Tue 23/2

2:30 p.m.-5:35 a.m.

1 stop12h 05m

C$ 636

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Thu 18/2

6:40 a.m.-1:40 p.m.

1 stop10h 00m

Seattle/Tacoma Intl

Tue 23/2

2:30 p.m.-5:35 a.m.

1 stop12h 05m

C$ 636

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Tue 16/2

6:40 a.m.-1:40 p.m.

1 stop10h 00m

Seattle/Tacoma Intl

Tue 23/2

2:30 p.m.-5:35 a.m.

1 stop12h 05m

C$ 636

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Thu 18/2

6:40 a.m.-1:40 p.m.

1 stop10h 00m

Seattle/Tacoma Intl

Wed 24/2

2:30 p.m.-5:35 a.m.

1 stop12h 05m

C$ 636

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Tue 16/2

6:40 a.m.-1:40 p.m.

1 stop10h 00m

Seattle/Tacoma Intl

Wed 24/2

2:30 p.m.-5:35 a.m.

1 stop12h 05m

C$ 636

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 17/2

6:40 a.m.-1:40 p.m.

1 stop10h 00m

Seattle/Tacoma Intl

Thu 25/2

11:31 a.m.-5:35 a.m.

2 stops15h 04m

C$ 678

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Thu 18/2

6:40 a.m.-1:40 p.m.

1 stop10h 00m

Seattle/Tacoma Intl

Thu 25/2

11:31 a.m.-5:35 a.m.

2 stops15h 04m

C$ 678

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from London, Ontario to Seattle

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

What is the cheapest airline that flies from London to Seattle/Tacoma Intl?

WestJet and Air Canada are the most popular carriers operating from London to Seattle/Tacoma Intl

Which airlines fly to Seattle?

Alaska Airlines, Air Canada and WestJet are the top three most popular airlines that fly to Seattle from London, Ontario according to our data. Alaska Airlines is the first choice among our users, with 37% of people opting to fly with this airline when travelling to Seattle. Keep in mind that there are 5 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

When to book flights from London, Ontario to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from London, Ontario to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap London, Ontario to Seattle (YXU to SEA) flight deals and tips

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

Best price found

C$ 265

Fastest flight time

10h 00m

Direct flights

None
The best one-way flight to Seattle from London, Ontario in the past 72 hours is C$ 265. The best round-trip flight deal from London, Ontario to Seattle found on momondo in the last 72 hours is C$ 527.
The fastest flight from London, Ontario to Seattle takes 10h 00m
There are no direct flights from London, Ontario to Seattle. There are no popular flight routes from London, Ontario to Seattle.
Search flight deals

Frequently asked questions about flying from London, Ontario to Seattle

  • How far is London to Seattle/Tacoma Intl by plane?

    The distance between London and Seattle/Tacoma Intl is about 3215.2 km. By plane, this route typically takes 10h 00m.

  • When did momondo last update prices for flights from London Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from London Airport to Seattle/Tacoma Intl Airport were last updated today.

  • How old do you have to be to fly from London Airport to Seattle/Tacoma Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The necessary travel and health documents for your Seattle/Tacoma Intl 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Lynnwood
SeaTac
Kirkland
Redmond
Tacoma
Marysville
Tukwila
Olympia
Woodinville
Puyallup
Bainbridge Island
Ellensburg
Edmonds
Chehalis
Fife
Renton
Shoreline
Ocean Shores
Lakewood

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Seattle . Millions of users trust and use momondo every year so you are in good hands.

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

Flights from London to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search for London to Seattle flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Of course. momondo tracks the price of London to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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