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 35m and 6h 06m, 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 58% 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 December 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.

$283 Cheap Flights from Washington to London in 2025/26

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Round-trip

Cheap round-trip flights

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8:00 pm - 8:46 am

SEA

YXU

9h 46m2 stops

5:40 pm - 10:16 pm

YXU

SEA

7h 36m1 stop

$283Air Canada

Thu, Feb 5 - Thu, Feb 12

8:10 am - 9:21 pm

SEA

YXU

10h 11m1 stop

5:40 pm - 10:16 pm

YXU

SEA

7h 36m1 stop

$302Air Canada

Thu, Feb 5 - Thu, Feb 12

12:57 pm - 5:05 pm

SEA

YXU

25h 08m3 stops

5:40 pm - 10:16 pm

YXU

SEA

7h 36m1 stop

$379United Airlines

Thu, Feb 5 - Thu, Feb 12

12:57 pm - 5:05 pm

SEA

YXU

25h 08m3 stops

5:10 am - 11:00 pm

YXU

SEA

20h 50m2 stops

$394United Airlines

Thu, Feb 5 - Thu, Feb 12

3:10 pm - 6:35 am

SEA

YXU

12h 25m1 stop

8:10 pm - 2:19 pm

YXU

SEA

21h 09m1 stop

$420WestJet

Mon, Mar 16 - Wed, Mar 18

11:55 am - 6:35 am

SEA

YXU

15h 40m2 stops

8:10 pm - 2:19 pm

YXU

SEA

21h 09m1 stop

$496WestJet

Mon, Mar 16 - Wed, Mar 18

3:10 pm - 6:35 am

SEA

YXU

12h 25m1 stop

8:10 pm - 10:25 am

YXU

SEA

41h 15m2 stops

$574WestJet

Mon, Mar 16 - Wed, Mar 18

8:00 pm - 8:46 am

SEA

YXU

9h 46m2 stops

5:10 am - 3:01 pm

YXU

SEA

12h 51m2 stops

$591Air Canada

Mon, Mar 16 - Wed, Mar 18

7:00 am - 9:21 pm

SEA

YXU

11h 21m2 stops

5:10 am - 8:58 pm

YXU

SEA

18h 48m3 stops

$927United Airlines

Mon, Mar 16 - Wed, Mar 18

WestJet flights from State of Washington to London, Ontario

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

WestJet

Mar 16

SEA3:10 pmSeattle/Tacoma Intl

12h 25m

1 stop

YXU6:35 amLondon

Mar 18

YXU8:10 pmLondon

21h 09m

1 stop

SEA2:19 pmSeattle/Tacoma Intl

$420

Find similar

WestJet

Mar 16

SEA3:10 pmSeattle/Tacoma Intl

12h 25m

1 stop

YXU6:35 amLondon

Mar 18

YXU8:10 pmLondon

21h 09m

1 stop

SEA2:19 pmSeattle/Tacoma Intl

$430

Find similar

WestJet

Mar 16

SEA11:55 amSeattle/Tacoma Intl

15h 40m

2 stops

YXU6:35 amLondon

Mar 18

YXU8:10 pmLondon

21h 09m

1 stop

SEA2:19 pmSeattle/Tacoma Intl

$496

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

Feb 5

SEA8:00 pmSeattle/Tacoma Intl

9h 46m

2 stops

YXU8:46 amLondon

Feb 12

YXU5:40 pmLondon

7h 36m

1 stop

SEA10:16 pmSeattle/Tacoma Intl

$283

Find similar

Air Canada

Feb 5

SEA8:10 amSeattle/Tacoma Intl

10h 11m

1 stop

YXU9:21 pmLondon

Feb 12

YXU5:40 pmLondon

7h 36m

1 stop

SEA10:16 pmSeattle/Tacoma Intl

$302

Find similar

Air Canada

Mar 16

SEA8:00 pmSeattle/Tacoma Intl

9h 46m

2 stops

YXU8:46 amLondon

Mar 18

YXU5:10 amLondon

12h 51m

2 stops

SEA3:01 pmSeattle/Tacoma Intl

$591

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

Thu 2/5

8:00 pm-8:46 am

2 stops9h 46m

London

Thu 2/12

5:40 pm-10:16 pm

1 stop7h 36m

$283

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 2/5

8:10 am-9:21 pm

1 stop10h 11m

London

Thu 2/12

5:40 pm-10:16 pm

1 stop7h 36m

$302

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 2/5

12:57 pm-5:05 pm

3 stops25h 08m

London

Thu 2/12

5:40 pm-10:16 pm

1 stop7h 36m

$379

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 2/5

12:57 pm-5:05 pm

3 stops25h 08m

London

Thu 2/12

5:10 am-11:00 pm

2 stops20h 50m

$394

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 3/16

3:10 pm-6:35 am

1 stop12h 25m

London

Wed 3/18

8:10 pm-2:19 pm

1 stop21h 09m

$420

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 3/16

11:55 am-6:35 am

2 stops15h 40m

London

Wed 3/18

8:10 pm-2:19 pm

1 stop21h 09m

$496

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 3/16

3:10 pm-6:35 am

1 stop12h 25m

London

Wed 3/18

8:10 pm-10:25 am

2 stops41h 15m

$574

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 3/16

8:00 pm-8:46 am

2 stops9h 46m

London

Wed 3/18

5:10 am-3:01 pm

2 stops12h 51m

$591

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 3/16

7:00 am-9:21 pm

2 stops11h 21m

London

Wed 3/18

5:10 am-8:58 pm

3 stops18h 48m

$927

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 49% 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

Fastest flight time	9h 05m
Direct flights	None

The fastest flight from State of Washington to London, Ontario takes 9h 05m

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 December 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 $460	Free Cancellation	Rating 7.1 10,551 reviews		Search Air Canada flights

Grand Bend

Port Stanley

Why use momondo?

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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Cheap flights from Washington to London from $283

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 2/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

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Find the cheapest flights from Washington to London

Cheap round-trip flights

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

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 49% 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 35m and 6h 06m, 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

Fastest flight time

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