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Cheap flights from London, Ontario to Seattle from C$ 366

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$ 683WestJet
Thu, 19 Nov - Sun, 22 Nov
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$ 776WestJet
Wed, 2 Dec - Thu, 3 Dec
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$ 778WestJet
Wed, 2 Dec - Thu, 3 Dec
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$ 785WestJet
Wed, 2 Dec - Thu, 3 Dec
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$ 797WestJet
Wed, 2 Dec - Thu, 3 Dec
Multiple Airlines Logo
6:40 a.m. - 1:40 p.m.YXU  London-SEA Seattle/Tacoma Intl
10h 00m1 stop Calgary
Multiple Airlines Logo
7:51 p.m. - 5:35 a.m.SEA  Seattle/Tacoma Intl-YXU London
30h 44m2 stops Las Vegas Harry Reid Intl Calgary
C$ 957Multiple Airlines
Thu, 19 Nov - Sun, 22 Nov
Air Canada Logo
3:20 p.m. - 8:59 p.m.YXU  London-SEA Seattle/Tacoma Intl
8h 39m1 stop Toronto Pearson Intl
Air Canada Logo
7:05 p.m. - 8:32 a.m.SEA  Seattle/Tacoma Intl-YXU London
10h 27m2 stops Vancouver Intl Toronto Pearson Intl
C$ 959Air Canada
Wed, 2 Dec - Thu, 3 Dec
Air Canada Logo
3:20 p.m. - 8:59 p.m.YXU  London-SEA Seattle/Tacoma Intl
8h 39m1 stop Toronto Pearson Intl
Air Canada Logo
7:05 p.m. - 8:32 a.m.SEA  Seattle/Tacoma Intl-YXU London
10h 27m2 stops Vancouver Intl Toronto Pearson Intl
C$ 961Air Canada
Wed, 2 Dec - Thu, 3 Dec
Air Canada Logo
3:20 p.m. - 8:59 p.m.YXU  London-SEA Seattle/Tacoma Intl
8h 39m1 stop Toronto Pearson Intl
Air Canada Logo
7:05 p.m. - 8:32 a.m.SEA  Seattle/Tacoma Intl-YXU London
10h 27m2 stops Vancouver Intl Toronto Pearson Intl
C$ 980Air Canada
Wed, 2 Dec - Thu, 3 Dec
Air Canada Logo
3:20 p.m. - 8:59 p.m.YXU  London-SEA Seattle/Tacoma Intl
8h 39m1 stop Toronto Pearson Intl
Air Canada Logo
7:05 p.m. - 8:32 a.m.SEA  Seattle/Tacoma Intl-YXU London
10h 27m2 stops Vancouver Intl Toronto Pearson Intl
C$ 985Air Canada
Wed, 2 Dec - Thu, 3 Dec

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WestJet flights from London, Ontario to Seattle

Our best WestJet deals on London, Ontario to Seattle flight tickets
WestJet
5 Feb
YXU6:40 a.m.London
10h 00m
1 stop
SEA1:40 p.m.Seattle/Tacoma Intl
8 Feb
SEA2:30 p.m.Seattle/Tacoma Intl
12h 05m
1 stop
YXU5:35 a.m.London
C$ 533
WestJet
19 Nov
YXU6:40 a.m.London
10h 00m
1 stop
SEA1:40 p.m.Seattle/Tacoma Intl
22 Nov
SEA2:30 p.m.Seattle/Tacoma Intl
12h 05m
1 stop
YXU5:35 a.m.London
C$ 683
WestJet
27 Nov
YXU6:40 a.m.London
10h 00m
1 stop
SEA1:40 p.m.Seattle/Tacoma Intl
4 Dec
SEA2:30 p.m.Seattle/Tacoma Intl
12h 05m
1 stop
YXU5:35 a.m.London
C$ 709

United Airlines flights from London, Ontario to Seattle

Our best United Airlines deals on London, Ontario to Seattle flight tickets
United Airlines
5 Feb
YXU9:15 a.m.London
17h 00m
2 stops
SEA11:15 p.m.Seattle/Tacoma Intl
8 Feb
SEA5:28 p.m.Seattle/Tacoma Intl
25h 24m
2 stops
YXU9:52 p.m.London
C$ 971
United Airlines
5 Feb
YXU3:20 p.m.London
32h 57m
3 stops
SEA9:17 p.m.Seattle/Tacoma Intl
8 Feb
SEA5:28 p.m.Seattle/Tacoma Intl
25h 24m
2 stops
YXU9:52 p.m.London
C$ 985
United Airlines
27 Nov
YXU9:15 a.m.London
17h 03m
2 stops
SEA11:18 p.m.Seattle/Tacoma Intl
4 Dec
SEA3:20 p.m.Seattle/Tacoma Intl
20h 22m
2 stops
YXU2:42 p.m.London
C$ 1,006

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

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Thu 19/11

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

1 stop10h 00m

Seattle/Tacoma Intl

Sun 22/11

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

1 stop12h 05m

C$ 683

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 2/12

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

1 stop10h 00m

Seattle/Tacoma Intl

Thu 3/12

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

1 stop12h 05m

C$ 776

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 2/12

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

1 stop10h 00m

Seattle/Tacoma Intl

Thu 3/12

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

1 stop12h 05m

C$ 778

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 2/12

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

1 stop10h 00m

Seattle/Tacoma Intl

Thu 3/12

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

1 stop12h 05m

C$ 785

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 2/12

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

1 stop10h 00m

Seattle/Tacoma Intl

Thu 3/12

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

1 stop12h 05m

C$ 797

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Thu 19/11

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

1 stop10h 00m

Seattle/Tacoma Intl

Sun 22/11

7:51 p.m.-5:35 a.m.

2 stops30h 44m

C$ 957
Quickest round-trip

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 2/12

3:20 p.m.-8:59 p.m.

1 stop8h 39m

Seattle/Tacoma Intl

Thu 3/12

7:05 p.m.-8:32 a.m.

2 stops10h 27m

C$ 959

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 2/12

3:20 p.m.-8:59 p.m.

1 stop8h 39m

Seattle/Tacoma Intl

Thu 3/12

7:05 p.m.-8:32 a.m.

2 stops10h 27m

C$ 961

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 2/12

3:20 p.m.-8:59 p.m.

1 stop8h 39m

Seattle/Tacoma Intl

Thu 3/12

7:05 p.m.-8:32 a.m.

2 stops10h 27m

C$ 980

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 2/12

3:20 p.m.-8:59 p.m.

1 stop8h 39m

Seattle/Tacoma Intl

Thu 3/12

7:05 p.m.-8:32 a.m.

2 stops10h 27m

C$ 985

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?

Air Canada and United Airlines 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 35% 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$ 366

Fastest flight time

8h 39m

Direct flights

None
The best one-way flight to Seattle from London, Ontario in the past 72 hours is C$ 366. The best round-trip flight deal from London, Ontario to Seattle found on momondo in the last 72 hours is C$ 683.
The fastest flight from London, Ontario to Seattle takes 8h 39m
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 8h 39m.

  • 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
SeaTac
Leavenworth
Lynnwood
Kirkland
Tukwila
Tacoma
Redmond
Woodinville
Marysville
Puyallup
Bainbridge Island
Ellensburg
Edmonds
Chehalis
Fife
Lakewood
Renton
Shoreline
Centralia
Ocean Shores

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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