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 Bellingham, and flying into London, Ontario, then you can expect flight times to average 4h 40m and 7h 15m, respectively.

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

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 54% 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 September 2025, there is 1 operator 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.

$147 Cheap Flights from Washington to London in 2025/26

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Round-trip

One-way

Cheap round-trip flights

3:10 pm - 7:12 pmSEA-YXU

25h 02m1 stop

8:10 pm - 10:23 amYXU-SEA

17h 13m2 stops

$339WestJet

Find Deal

Sun, Nov 2 - Sun, Nov 9

8:00 pm - 5:05 pmSEA-YXU

18h 05m2 stops

5:40 pm - 10:16 pmYXU-SEA

7h 36m1 stop

$405Air Canada

Find Deal

Fri, Oct 31 - Fri, Nov 7

8:00 pm - 5:05 pmSEA-YXU

18h 05m2 stops

9:25 am - 7:16 pmYXU-SEA

12h 51m2 stops

$410Air Canada

Find Deal

Fri, Oct 31 - Fri, Nov 7

3:10 pm - 7:12 pmSEA-YXU

25h 02m1 stop

8:10 pm - 2:20 pmYXU-SEA

21h 10m1 stop

$439WestJet

Find Deal

Sun, Nov 2 - Sun, Nov 9

11:55 am - 7:12 pmSEA-YXU

28h 17m2 stops

8:10 pm - 10:23 amYXU-SEA

17h 13m2 stops

$498WestJet

Find Deal

Sun, Nov 2 - Sun, Nov 9

11:55 am - 7:12 pmSEA-YXU

28h 17m3 stops

8:10 pm - 10:23 amYXU-SEA

17h 13m2 stops

$509WestJet

Find Deal

Sun, Nov 2 - Sun, Nov 9

10:55 pm - 7:12 pmSEA-YXU

17h 17m3 stops

8:10 pm - 10:23 amYXU-SEA

17h 13m3 stops

$603WestJet

Find Deal

Sun, Nov 2 - Sun, Nov 9

8:00 pm - 8:46 amSEA-YXU

9h 46m2 stops

5:40 pm - 10:16 pmYXU-SEA

7h 36m1 stop

$605Air Canada

Find Deal

Mon, Dec 22 - Mon, Dec 29

8:10 am - 9:21 pmSEA-YXU

10h 11m1 stop

5:40 pm - 10:16 pmYXU-SEA

7h 36m1 stop

$624Air Canada

Find Deal

Mon, Dec 22 - Mon, Dec 29

5:02 am - 9:21 pmSEA-YXU

13h 19m2 stops

5:45 am - 9:17 pmYXU-SEA

18h 32m3 stops

$1,487United Airlines

Find Deal

Mon, Dec 22 - Mon, Dec 29

WestJet flights from State of Washington to London, Ontario

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

WestJet

Nov 2

SEA3:10 pmSeattle/Tacoma Intl

25h 02m

1 stop

YXU7:12 pmLondon

Nov 9

YXU8:10 pmLondon

17h 13m

2 stops

SEA10:23 amSeattle/Tacoma Intl

$339

Find similar

WestJet

Nov 2

SEA3:10 pmSeattle/Tacoma Intl

25h 02m

1 stop

YXU7:12 pmLondon

Nov 9

YXU8:10 pmLondon

21h 10m

1 stop

SEA2:20 pmSeattle/Tacoma Intl

$439

Find similar

WestJet

Nov 2

SEA11:55 amSeattle/Tacoma Intl

28h 17m

2 stops

YXU7:12 pmLondon

Nov 9

YXU8:10 pmLondon

17h 13m

2 stops

SEA10:23 amSeattle/Tacoma Intl

$498

Find similar

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

Oct 31

SEA8:00 pmSeattle/Tacoma Intl

18h 05m

2 stops

YXU5:05 pmLondon

Nov 7

YXU5:40 pmLondon

7h 36m

1 stop

SEA10:16 pmSeattle/Tacoma Intl

$405

Find similar

Air Canada

Oct 31

SEA8:00 pmSeattle/Tacoma Intl

18h 05m

2 stops

YXU5:05 pmLondon

Nov 7

YXU9:25 amLondon

12h 51m

2 stops

SEA7:16 pmSeattle/Tacoma Intl

$410

Find similar

Air Canada

Dec 22

SEA8:00 pmSeattle/Tacoma Intl

9h 46m

2 stops

YXU8:46 amLondon

Dec 29

YXU5:40 pmLondon

7h 36m

1 stop

SEA10:16 pmSeattle/Tacoma Intl

$605

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

Sun 11/2

3:10 pm-7:12 pm

1 stop25h 02m

London

Sun 11/9

8:10 pm-10:23 am

2 stops17h 13m

$339

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 10/31

8:00 pm-5:05 pm

2 stops18h 05m

London

Fri 11/7

5:40 pm-10:16 pm

1 stop7h 36m

$405

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 10/31

8:00 pm-5:05 pm

2 stops18h 05m

London

Fri 11/7

9:25 am-7:16 pm

2 stops12h 51m

$410

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sun 11/2

3:10 pm-7:12 pm

1 stop25h 02m

London

Sun 11/9

8:10 pm-2:20 pm

1 stop21h 10m

$439

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sun 11/2

11:55 am-7:12 pm

2 stops28h 17m

London

Sun 11/9

8:10 pm-10:23 am

2 stops17h 13m

$498

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sun 11/2

11:55 am-7:12 pm

3 stops28h 17m

London

Sun 11/9

8:10 pm-10:23 am

2 stops17h 13m

$509

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sun 11/2

10:55 pm-7:12 pm

3 stops17h 17m

London

Sun 11/9

8:10 pm-10:23 am

3 stops17h 13m

$603

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 12/22

8:00 pm-8:46 am

2 stops9h 46m

London

Mon 12/29

5:40 pm-10:16 pm

1 stop7h 36m

$605

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 12/22

8:10 am-9:21 pm

1 stop10h 11m

London

Mon 12/29

5:40 pm-10:16 pm

1 stop7h 36m

$624

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 12/22

5:02 am-9:21 pm

2 stops13h 19m

London

Mon 12/29

5:45 am-9:17 pm

3 stops18h 32m

$1,487

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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

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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 37% 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

Direct flights	None

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

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 September 2025, there is 1 operator 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
Air Canada	PriceFrom $244	Free Cancellation	Rating 7.1 10,000 reviews		Search Air Canada flights

Grand Bend

Port Stanley

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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.

An easier way to manage your London, Ontario trip

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Cheap flights from Washington to London from $147

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to London departing on 11/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

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Filter for what you want

Trusted and free

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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

Air Canada flights from State of Washington to London, Ontario

Our best Air Canada 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 37% on your flight if you consider stops on a State of Washington to London, Ontario flight.

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

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 Bellingham, and flying into London, Ontario, then you can expect flight times to average 4h 40m and 7h 15m, 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

Direct flights

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