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 59% 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.

What is the cheapest airline that flies from Washington to London?

United Airlines, Air Canada, and WestJet are the most popular carriers operating from Washington to London

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 45m and 7h 29m, respectively.

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

Prices for flights from Washington to London Airport refresh daily.

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.

$314 Cheap Flights from Washington to London, Ontario in 2026

1 adult

0 bags

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Washington to London

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:35 pm - 5:20 am

SEA

YXU

6h 45m

1 stop

6:10 am - 6:45 pm

YXU

SEA

15h 35m

1 stop

$314WestJet

Wed, Sep 23 - Wed, Oct 7

7:35 pm - 5:20 am

SEA

YXU

6h 45m

1 stop

6:10 am - 6:45 pm

YXU

SEA

15h 35m

1 stop

$337WestJet

Wed, Sep 23 - Wed, Oct 7

7:00 am - 4:45 pm

SEA

YXU

6h 45m

1 stop

6:10 am - 6:45 pm

YXU

SEA

15h 35m

1 stop

$338WestJet

Wed, Aug 19 - Sat, Aug 22

10:30 am - 5:20 am

SEA

YXU

15h 50m

1 stop

6:10 am - 6:45 pm

YXU

SEA

15h 35m

1 stop

$372WestJet

Tue, Sep 22 - Wed, Oct 7

7:35 pm - 4:45 pm

SEA

YXU

18h 10m

1 stop

5:55 pm - 9:40 am

YXU

SEA

18h 45m

1 stop

$385WestJet

Fri, Jun 19 - Fri, Jun 26

7:35 pm - 5:20 am

SEA

YXU

6h 45m

1 stop

5:55 pm - 9:40 am

YXU

SEA

18h 45m

1 stop

$476WestJet

Thu, Sep 17 - Mon, Sep 21

10:30 am - 1:50 pm

SEA

YXU

48h 20m

2 stops

6:10 am - 6:45 pm

YXU

SEA

15h 35m

1 stop

$502WestJet

Wed, Jun 3 - Wed, Jun 10

7:35 pm - 5:20 am

SEA

YXU

6h 45m

1 stop

2:40 pm - 9:40 am

YXU

SEA

22h 00m

2 stops

$579WestJet

Fri, Jun 19 - Fri, Jun 26

7:35 pm - 5:20 am

SEA

YXU

6h 45m

1 stop

6:10 am - 6:55 pm

YXU

SEA

15h 45m

2 stops

$606Delta

Wed, Sep 23 - Wed, Oct 7

7:35 pm - 5:20 am

SEA

YXU

6h 45m

1 stop

6:10 am - 6:55 pm

YXU

SEA

15h 45m

2 stops

$611Delta

Tue, Sep 22 - Wed, Oct 7

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

Sep 17

SEA5:40 amSeattle/Tacoma Intl

9h 03m

2 stops

YXU5:43 pmLondon

Sep 21

YXU3:30 pmLondon

8h 34m

1 stop

SEA9:04 pmSeattle/Tacoma Intl

$645

Air Canada

Sep 17

SEA7:20 pmSeattle/Tacoma Intl

11h 00m

2 stops

YXU9:20 amLondon

Sep 21

YXU5:40 amLondon

11h 42m

2 stops

SEA2:22 pmSeattle/Tacoma Intl

$650

Air Canada

Jun 7

SEA8:00 amSeattle/Tacoma Intl

10h 38m

1 stop

YXU9:38 pmLondon

Jun 14

YXU3:30 pmLondon

8h 38m

1 stop

SEA9:08 pmSeattle/Tacoma Intl

$665

WestJet flights from State of Washington to London, Ontario

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

WestJet

Sep 23

SEA7:35 pmSeattle/Tacoma Intl

6h 45m

1 stop

YXU5:20 amLondon

Oct 7

YXU6:10 amLondon

15h 35m

1 stop

SEA6:45 pmSeattle/Tacoma Intl

$314

WestJet

Aug 19

SEA7:00 amSeattle/Tacoma Intl

6h 45m

1 stop

YXU4:45 pmLondon

Aug 22

YXU6:10 amLondon

17h 50m

1 stop

SEA9:00 pmSeattle/Tacoma Intl

$338

WestJet

Jun 6

SEA10:30 amSeattle/Tacoma Intl

15h 50m

1 stop

YXU5:20 amLondon

Jun 13

YXU6:10 amLondon

15h 35m

1 stop

SEA6:45 pmSeattle/Tacoma Intl

$347

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

Cheapest round-trip

Quickest round-trip

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Wed 9/23

7:35 pm-5:20 am

1 stop6h 45m

London

Wed 10/7

6:10 am-6:45 pm

1 stop15h 35m

$314

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Wed 9/23

7:35 pm-5:20 am

1 stop6h 45m

London

Wed 10/7

6:10 am-6:45 pm

1 stop15h 35m

$337

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Wed 8/19

7:00 am-4:45 pm

1 stop6h 45m

London

Sat 8/22

6:10 am-6:45 pm

1 stop15h 35m

$338

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 9/22

10:30 am-5:20 am

1 stop15h 50m

London

Wed 10/7

6:10 am-6:45 pm

1 stop15h 35m

$372

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 6/19

7:35 pm-4:45 pm

1 stop18h 10m

London

Fri 6/26

5:55 pm-9:40 am

1 stop18h 45m

$385

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 9/17

7:35 pm-5:20 am

1 stop6h 45m

London

Mon 9/21

5:55 pm-9:40 am

1 stop18h 45m

$476

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Wed 6/3

10:30 am-1:50 pm

2 stops48h 20m

London

Wed 6/10

6:10 am-6:45 pm

1 stop15h 35m

$502

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 6/19

7:35 pm-5:20 am

1 stop6h 45m

London

Fri 6/26

2:40 pm-9:40 am

2 stops22h 00m

$579

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Wed 9/23

7:35 pm-5:20 am

1 stop6h 45m

London

Wed 10/7

6:10 am-6:55 pm

2 stops15h 45m

$606

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 9/22

7:35 pm-5:20 am

1 stop6h 45m

London

Wed 10/7

6:10 am-6:55 pm

2 stops15h 45m

$611

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 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

Airlines

Other information

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

You could potentially save up to 66% 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	6h 45m
Direct flights	None

The fastest flight from State of Washington to London, Ontario takes 6h 45m

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

Frequently asked questions about flying from Washington to London, Ontario

When did momondo last update prices for flights from Washington to London Airport?
Prices for flights from Washington to London Airport refresh daily.
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.

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.

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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Mon 6/8

Mon 6/15

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Canada

Nearby airports

Airlines

Cabin classes

Other Canada destinations

Other flights from Washington

Complete your trip

Feeling lucky

Cheap flights from Washington to London from $314

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 9/23. 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

Price Alerts

Price Alerts

Find the cheapest flights from Washington to London

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Air Canada flights from State of Washington to London, Ontario

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

WestJet flights from State of Washington to London, Ontario

Our best WestJet 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

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

What is the cheapest airline that flies from Washington to London?

What airlines fly to London, Ontario?

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

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

Frequently asked questions about flying from Washington to London, Ontario

Traveling to a place near London?

Why use momondo?

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

Fly your favorite airline to London

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to London

List of cabin classes available on flights landing in London. Availability may vary depending on flight origin and airline.

Popular cities in Canada

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from Washington

According to popular flight searches on momondo this year

Complete your trip to London

Explore popular destinations other users love

According to popular flight searches on momondo this year