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

If you’re flying from a popular airport in State of Washington, such as Seattle or Spokane, and flying into London, Ontario, then you can expect flight times to average 4h 40m and 6h 52m, respectively.

What airlines fly to London, Ontario?

Alaska Airlines, Air Canada and WestJet 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 51% of people opting to fly with this airline when traveling to London, Ontario. Keep in mind that there are 5 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 many operators does momondo search for flights from Washington to London Airport?

As of August 2025, there are 2 operators available to choose from for flights from Washington to London Airport.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to London Airport.

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

The required travel and health documents for your London Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$449 Cheap Flights from Washington to London in 2025

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Round-trip

One-way

Cheap round-trip flights

8:40 am - 5:14 amSEA-YXU

17h 34m1 stop

8:00 pm - 6:38 pmYXU-SEA

25h 38m1 stop

$472WestJet

Find Deal

Fri, Aug 22 - Sun, Aug 24

1:15 pm - 5:14 amSEA-YXU

12h 59m2 stops

6:00 am - 6:38 pmYXU-SEA

15h 38m1 stop

$485WestJet

Find Deal

Fri, Aug 22 - Sun, Aug 24

2:05 pm - 5:12 amSEA-YXU

12h 07m1 stop

6:00 am - 12:59 pmYXU-SEA

9h 59m1 stop

$507WestJet

Find Deal

Mon, Sep 15 - Mon, Sep 22

7:34 pm - 9:19 amSEA-YXU

10h 45m2 stops

6:10 am - 10:59 amYXU-SEA

7h 49m1 stop

$621United Airlines

Find Deal

Mon, Sep 15 - Mon, Sep 22

11:10 pm - 3:17 pmSEA-YXU

13h 07m2 stops

10:00 am - 10:20 pmYXU-SEA

15h 20m2 stops

$636United Airlines

Find Deal

Mon, Sep 15 - Mon, Sep 22

1:15 pm - 5:14 amSEA-YXU

12h 59m2 stops

6:00 am - 12:35 pmYXU-SEA

33h 35m2 stops

$641WestJet

Find Deal

Fri, Aug 22 - Sun, Aug 24

1:15 pm - 5:14 amSEA-YXU

12h 59m2 stops

6:00 am - 12:35 pmYXU-SEA

33h 35m3 stops

$675WestJet

Find Deal

Fri, Aug 22 - Sun, Aug 24

11:55 pm - 5:14 amSEA-YXU

26h 19m3 stops

8:00 pm - 12:35 pmYXU-SEA

19h 35m3 stops

$974

Find Deal

Fri, Aug 22 - Sun, Aug 24

WestJet flights from State of Washington to London, Ontario

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

WestJet

Aug 22

SEA8:40 amSeattle/Tacoma Intl

17h 34m

1 stop

YXU5:14 amLondon

Aug 24

YXU8:00 pmLondon

25h 38m

1 stop

SEA6:38 pmSeattle/Tacoma Intl

$472

Find similar

WestJet

Aug 22

SEA1:15 pmSeattle/Tacoma Intl

12h 59m

2 stops

YXU5:14 amLondon

Aug 24

YXU6:00 amLondon

15h 38m

1 stop

SEA6:38 pmSeattle/Tacoma Intl

$485

Find similar

WestJet

Sep 15

SEA2:05 pmSeattle/Tacoma Intl

12h 07m

1 stop

YXU5:12 amLondon

Sep 22

YXU6:00 amLondon

9h 59m

1 stop

SEA12:59 pmSeattle/Tacoma Intl

$507

Find similar

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

Sep 15

SEA7:34 pmSeattle/Tacoma Intl

10h 45m

2 stops

YXU9:19 amLondon

Sep 22

YXU6:10 amLondon

7h 49m

1 stop

SEA10:59 amSeattle/Tacoma Intl

$621

Find similar

United Airlines

Sep 15

SEA11:10 pmSeattle/Tacoma Intl

13h 07m

2 stops

YXU3:17 pmLondon

Sep 22

YXU10:00 amLondon

15h 20m

2 stops

SEA10:20 pmSeattle/Tacoma Intl

$636

Find similar

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

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 8/22

8:40 am-5:14 am

1 stop17h 34m

London

Sun 8/24

8:00 pm-6:38 pm

1 stop25h 38m

$472

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 8/22

1:15 pm-5:14 am

2 stops12h 59m

London

Sun 8/24

6:00 am-6:38 pm

1 stop15h 38m

$485

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 9/15

2:05 pm-5:12 am

1 stop12h 07m

London

Mon 9/22

6:00 am-12:59 pm

1 stop9h 59m

$507

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 9/15

7:34 pm-9:19 am

2 stops10h 45m

London

Mon 9/22

6:10 am-10:59 am

1 stop7h 49m

$621

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 9/15

11:10 pm-3:17 pm

2 stops13h 07m

London

Mon 9/22

10:00 am-10:20 pm

2 stops15h 20m

$636

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 8/22

1:15 pm-5:14 am

2 stops12h 59m

London

Sun 8/24

6:00 am-12:35 pm

2 stops33h 35m

$641

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 8/22

1:15 pm-5:14 am

2 stops12h 59m

London

Sun 8/24

6:00 am-12:35 pm

3 stops33h 35m

$675

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 8/22

11:55 pm-5:14 am

3 stops26h 19m

London

Sun 8/24

8:00 pm-12:35 pm

3 stops19h 35m

$974

Flights are sorted by cheapest round-trip flights first.

Sorted 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

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

According to our data, Thursday is the cheapest day to fly to London, Ontario from State of Washington. The lowest ticket price found for a Thursday departure recently was $244. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Tuesday as prices are generally higher than usual. According to our data, the average ticket price to London, Ontario on Tuesday is $680.

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

In the evening is the cheapest time of day to fly from State of Washington to London, Ontario when you can find flight prices for as low as $385. Flying to London, Ontario in the evening is an ideal time because this is during off-peak travel hours. In the morning is when there is more demand to fly to London, Ontario, so prices are often more expensive at around $495 per ticket.

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

You could potentially save up to 12% 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

Best Price Found	$472
Fastest flight time	10h 45m
Direct flights	None
Airports in London, Ontario	1 airport

The best flight deal from State of Washington to London, Ontario found on momondo in the last 72 hours is $472

The fastest flight from State of Washington to London, Ontario takes 10h 45m

There are no direct flights from State of Washington 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)

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 many operators does momondo search for flights from Washington to London Airport?
As of August 2025, there are 2 operators available to choose from for flights from Washington to London Airport.
How old do you have to be to fly from Washington to London Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to London Airport.
What documentation or ID do you need to fly to London Airport?
The required travel and health documents for your London Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from State of Washington to London, Ontario

Compare and see reviews for airlines that fly from State of Washington to London, Ontario with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $185	Free Cancellation	Rating 7.4 8,905 reviews		Search United Airlines flights
Air Canada	PriceFrom $244	Free Cancellation	Rating 7.1 9,860 reviews		Search Air Canada flights

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington to London for you.

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

Yes. All flights to London from Washington on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo provides multiple filters to help you find the best flight to London from Washington. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are not ready to book a flight from Washington to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.

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Flights to Torontofrom $95

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Flights to Saskatoonfrom $170

Flights to Kelownafrom $189

Flights to St. John'sfrom $283

Flights to Reginafrom $274

Cheap flights from Washington to London from $472

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 8/22. 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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Filter for what you want

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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

United Airlines flights from State of Washington to London, Ontario

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

momondo Fare Finder

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

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

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

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

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

You could potentially save up to 12% on your flight if you consider stops on a State of Washington to London, Ontario flight.

What airlines fly to London, Ontario?

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

If you’re flying from a popular airport in State of Washington, such as Seattle or Spokane, and flying into London, Ontario, then you can expect flight times to average 4h 40m and 6h 52m, respectively.

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

Best Price Found

Fastest flight time

Direct flights

Airports in London, Ontario

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

How many operators does momondo search for flights from Washington to London Airport?

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

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

Best airlines flying from State of Washington to London, Ontario

Compare and see reviews for airlines that fly from State of Washington to London, Ontario with momondo

Traveling to a place near London?

Why use momondo?

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

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

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

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

An easier way to manage your London, Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Canada

Airports servicing Ontario