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Cheap flights from Seattle to London, Ontario from C$ 222

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to London, Ontario departing on 16/5. 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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Find the cheapest flights from Seattle to London

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from Seattle to London.
Air Canada Logo
7:20 a.m. - 9:28 p.m.SEA-YXU
11h 08m2 stops
Air Canada Logo
6:15 a.m. - 10:45 a.m.YXU-SEA
7h 30m1 stop
C$ 303Air Canada
Find Deal
Sat, 17 May - Sat, 24 May
Air Canada Logo
7:20 a.m. - 9:28 p.m.SEA-YXU
11h 08m2 stops
Air Canada Logo
9:55 a.m. - 7:37 p.m.YXU-SEA
12h 42m2 stops
C$ 308Air Canada
Find Deal
Sat, 17 May - Sat, 24 May
WestJet Logo
7:05 a.m. - 5:14 a.m.SEA-YXU
19h 09m1 stop
WestJet Logo
6:00 a.m. - 12:58 p.m.YXU-SEA
9h 58m1 stop
C$ 328WestJet
Find Deal
Sat, 17 May - Sat, 24 May
WestJet Logo
1:50 p.m. - 5:14 a.m.SEA-YXU
12h 24m1 stop
WestJet Logo
6:00 a.m. - 12:58 p.m.YXU-SEA
9h 58m1 stop
C$ 355WestJet
Find Deal
Wed, 25 Jun - Sat, 28 Jun
Air Canada Logo
11:30 a.m. - 9:28 p.m.SEA-YXU
6h 58m1 stop
Air Canada Logo
6:15 a.m. - 10:51 a.m.YXU-SEA
7h 36m1 stop
C$ 370Air Canada
Find Deal
Sat, 31 May - Sat, 7 Jun
Air Canada Logo
11:30 a.m. - 9:28 p.m.SEA-YXU
6h 58m1 stop
Air Canada Logo
6:15 a.m. - 12:58 p.m.YXU-SEA
9h 43m2 stops
C$ 378Air Canada
Find Deal
Sat, 31 May - Sat, 7 Jun
United Airlines Logo
5:18 p.m. - 3:03 p.m.SEA-YXU
18h 45m2 stops
United Airlines Logo
6:15 a.m. - 10:45 a.m.YXU-SEA
7h 30m1 stop
C$ 385United Airlines
Find Deal
Sat, 17 May - Sat, 24 May
United Airlines Logo
11:59 p.m. - 3:03 p.m.SEA-YXU
12h 04m2 stops
United Airlines Logo
3:40 p.m. - 9:50 a.m.YXU-SEA
21h 10m2 stops
C$ 406United Airlines
Find Deal
Sat, 17 May - Sat, 24 May
 Logo
3:24 p.m. - 3:03 p.m.SEA-YXU
20h 39m3 stops
 Logo
9:55 a.m. - 7:37 p.m.YXU-SEA
12h 42m2 stops
C$ 516
Find Deal
Wed, 30 Apr - Wed, 7 May
 Logo
5:30 a.m. - 5:14 a.m.SEA-YXU
20h 44m3 stops
 Logo
9:55 a.m. - 7:37 p.m.YXU-SEA
12h 42m2 stops
C$ 518
Find Deal
Sat, 17 May - Sat, 24 May

United Airlines flights from Seattle to London, Ontario

Our best United Airlines deals on Seattle to London, Ontario flight tickets
United Airlines
17 May
SEA5:18 p.m.Seattle/Tacoma Intl
18h 45m
2 stops
YXU3:03 p.m.London
24 May
YXU6:15 a.m.London
7h 30m
1 stop
SEA10:45 a.m.Seattle/Tacoma Intl
United Airlines
17 May
SEA11:59 p.m.Seattle/Tacoma Intl
12h 04m
2 stops
YXU3:03 p.m.London
24 May
YXU3:40 p.m.London
21h 10m
2 stops
SEA9:50 a.m.Seattle/Tacoma Intl
United Airlines
25 Jun
SEA7:59 p.m.Seattle/Tacoma Intl
15h 58m
2 stops
YXU2:57 p.m.London
28 Jun
YXU6:15 a.m.London
7h 36m
1 stop
SEA10:51 a.m.Seattle/Tacoma Intl

WestJet flights from Seattle to London, Ontario

Our best WestJet deals on Seattle to London, Ontario flight tickets
WestJet
17 May
SEA7:05 a.m.Seattle/Tacoma Intl
19h 09m
1 stop
YXU5:14 a.m.London
24 May
YXU6:00 a.m.London
9h 58m
1 stop
SEA12:58 p.m.Seattle/Tacoma Intl
WestJet
25 Jun
SEA1:50 p.m.Seattle/Tacoma Intl
12h 24m
1 stop
YXU5:14 a.m.London
28 Jun
YXU6:00 a.m.London
9h 58m
1 stop
SEA12:58 p.m.Seattle/Tacoma Intl
WestJet
17 May
SEA7:05 a.m.Seattle/Tacoma Intl
19h 09m
1 stop
YXU5:14 a.m.London
24 May
YXU6:00 a.m.London
9h 58m
1 stop
SEA12:58 p.m.Seattle/Tacoma Intl

See travel insights to London from

How to get the cheapest flight ticket from Seattle 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

What is the cheapest day to depart on your flight to London, Ontario?

According to our data, Monday is the cheapest day to fly to London, Ontario from Seattle. The lowest ticket price found for a Monday departure recently was C$ 0. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. On the other hand, Friday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travellers. As a result, prices tend to be around C$ 555.

What is the cheapest time of day to depart on your flight to London, Ontario?

Our most recent data shows that the best time of day to fly to London, Ontario is in the morning. Flights from Seattle to London, Ontario during this time can be as low as C$ 0. Flights in the evening are often more expensive with an average ticket price of C$ 555.

When to book flights from Seattle to London, Ontario

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

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

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

Best price found

C$ 222

Fastest flight time

6h 58m

Direct flights

None

Airports in London, Ontario

1 airport
The best one-way flight to London, Ontario from Seattle in the past 72 hours is C$ 222. The best round-trip flight deal from Seattle to London, Ontario found on momondo in the last 72 hours is C$ 303.
The fastest flight from Seattle to London, Ontario takes 6h 58m
There are no direct flights from Seattle to London, Ontario. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - London Airport.
There is 1 airport near London, Ontario: London (YXU)

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

    London is 3215.2 km away from Seattle/Tacoma Intl. A reasonable flight in good conditions will take 6h 58m.

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

    Prices for flights from Seattle/Tacoma Intl Airport to London Airport are updated daily.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to London Airport.

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

    The travel and health documents required for your trip to London Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.


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 Seattle to London?

Finding the right flight to London from Seattle 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 Seattle to London with flexible booking policies on momondo?

All flight searches from Seattle to London on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search for Seattle to London 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 Seattle to London right now. Can momondo alert me if prices change?

Price alerts on flights to London from Seattle are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.


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