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

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

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

The average flight duration from State of Washington to London, Ontario depends on which airport you fly into and out of. Flying from Seattle to Toronto Pearson Intl Airport is 4h 43m on average, while flying from Pasco to Toronto Pearson Intl Airport is 7h 20m on average. Toronto Pearson Intl Airport is the most popular airport in London, Ontario.

Which 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 61% of people opting to fly with this airline when travelling to London, Ontario. Keep in mind that there are 3 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 old do you have to be to fly from Washington to London Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington to London Airport.

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

The necessary travel and health documents for your London Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

C$ 430 Cheap Flights from Washington to London, Ontario in 2026

1 adult

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Early arrival? 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

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:35 p.m. - 5:20 a.m.

SEA

YXU

6h 45m

1 stop

6:10 a.m. - 6:45 p.m.

YXU

SEA

15h 35m

1 stop

C$ 430WestJet

Wed, 23 Sep - Wed, 7 Oct

7:35 p.m. - 5:20 a.m.

SEA

YXU

6h 45m

1 stop

6:10 a.m. - 6:45 p.m.

YXU

SEA

15h 35m

1 stop

C$ 451WestJet

Fri, 5 Jun - Sat, 13 Jun

7:35 p.m. - 5:20 a.m.

SEA

YXU

6h 45m

1 stop

6:10 a.m. - 6:45 p.m.

YXU

SEA

15h 35m

1 stop

C$ 462WestJet

Fri, 5 Jun - Sat, 13 Jun

10:30 a.m. - 5:20 a.m.

SEA

YXU

15h 50m

1 stop

6:10 a.m. - 6:45 p.m.

YXU

SEA

15h 35m

1 stop

C$ 469WestJet

Fri, 5 Jun - Sat, 13 Jun

10:30 a.m. - 5:20 a.m.

SEA

YXU

15h 50m

1 stop

6:10 a.m. - 6:45 p.m.

YXU

SEA

15h 35m

1 stop

C$ 475WestJet

Sat, 6 Jun - Sat, 13 Jun

10:30 a.m. - 5:20 a.m.

SEA

YXU

15h 50m

1 stop

6:10 a.m. - 6:45 p.m.

YXU

SEA

15h 35m

1 stop

C$ 510WestJet

Tue, 22 Sep - Wed, 7 Oct

7:35 p.m. - 4:45 p.m.

SEA

YXU

18h 10m

1 stop

5:55 p.m. - 9:40 a.m.

YXU

SEA

18h 45m

1 stop

C$ 555WestJet

Thu, 17 Sep - Mon, 21 Sep

10:30 a.m. - 1:50 p.m.

SEA

YXU

24h 20m

2 stops

5:55 p.m. - 9:40 a.m.

YXU

SEA

18h 45m

1 stop

C$ 632WestJet

Thu, 11 Jun - Fri, 12 Jun

10:30 a.m. - 1:50 p.m.

SEA

YXU

24h 20m

2 stops

6:10 a.m. - 6:45 p.m.

YXU

SEA

15h 35m

1 stop

C$ 645WestJet

Sat, 6 Jun - Sat, 13 Jun

7:35 p.m. - 5:20 a.m.

SEA

YXU

6h 45m

1 stop

5:55 p.m. - 6:45 p.m.

YXU

SEA

27h 50m

1 stop

C$ 651WestJet

Thu, 17 Sep - Mon, 21 Sep

WestJet flights from State of Washington to London, Ontario

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

WestJet

23 Sep

SEA7:35 p.m.Seattle/Tacoma Intl

6h 45m

1 stop

YXU5:20 a.m.London

7 Oct

YXU6:10 a.m.London

15h 35m

1 stop

SEA6:45 p.m.Seattle/Tacoma Intl

C$ 430

WestJet

5 Jun

SEA7:35 p.m.Seattle/Tacoma Intl

6h 45m

1 stop

YXU5:20 a.m.London

13 Jun

YXU6:10 a.m.London

15h 35m

1 stop

SEA6:45 p.m.Seattle/Tacoma Intl

C$ 451

WestJet

5 Jun

SEA7:35 p.m.Seattle/Tacoma Intl

6h 45m

1 stop

YXU5:20 a.m.London

13 Jun

YXU6:10 a.m.London

15h 35m

1 stop

SEA6:45 p.m.Seattle/Tacoma Intl

C$ 462

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

5 Jun

SEA5:00 p.m.Seattle/Tacoma Intl

21h 33m

3 stops

YXU5:33 p.m.London

13 Jun

YXU3:30 p.m.London

8h 38m

1 stop

SEA9:08 p.m.Seattle/Tacoma Intl

C$ 977

United Airlines

25 Jun

SEA5:00 p.m.Seattle/Tacoma Intl

18h 57m

2 stops

YXU2:57 p.m.London

2 Jul

YXU5:10 a.m.London

13h 59m

2 stops

SEA4:09 p.m.Seattle/Tacoma Intl

C$ 991

United Airlines

5 Jun

SEA5:00 p.m.Seattle/Tacoma Intl

21h 33m

3 stops

YXU5:33 p.m.London

13 Jun

YXU3:30 p.m.London

12h 43m

2 stops

SEA1:13 a.m.Seattle/Tacoma Intl

C$ 997

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 23/9

7:35 p.m.-5:20 a.m.

1 stop6h 45m

London

Wed 7/10

6:10 a.m.-6:45 p.m.

1 stop15h 35m

C$ 430

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 5/6

7:35 p.m.-5:20 a.m.

1 stop6h 45m

London

Sat 13/6

6:10 a.m.-6:45 p.m.

1 stop15h 35m

C$ 451

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 5/6

7:35 p.m.-5:20 a.m.

1 stop6h 45m

London

Sat 13/6

6:10 a.m.-6:45 p.m.

1 stop15h 35m

C$ 462

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 5/6

10:30 a.m.-5:20 a.m.

1 stop15h 50m

London

Sat 13/6

6:10 a.m.-6:45 p.m.

1 stop15h 35m

C$ 469

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sat 6/6

10:30 a.m.-5:20 a.m.

1 stop15h 50m

London

Sat 13/6

6:10 a.m.-6:45 p.m.

1 stop15h 35m

C$ 475

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 22/9

10:30 a.m.-5:20 a.m.

1 stop15h 50m

London

Wed 7/10

6:10 a.m.-6:45 p.m.

1 stop15h 35m

C$ 510

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 17/9

7:35 p.m.-4:45 p.m.

1 stop18h 10m

London

Mon 21/9

5:55 p.m.-9:40 a.m.

1 stop18h 45m

C$ 555

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 11/6

10:30 a.m.-1:50 p.m.

2 stops24h 20m

London

Fri 12/6

5:55 p.m.-9:40 a.m.

1 stop18h 45m

C$ 632

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sat 6/6

10:30 a.m.-1:50 p.m.

2 stops24h 20m

London

Sat 13/6

6:10 a.m.-6:45 p.m.

1 stop15h 35m

C$ 645

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 17/9

7:35 p.m.-5:20 a.m.

1 stop6h 45m

London

Mon 21/9

5:55 p.m.-6:45 p.m.

1 stop27h 50m

C$ 651

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 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 70% 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 a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington to London Airport.
What documentation or ID do you need to fly to London Airport?
The necessary travel and health documents for your London Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted 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?

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

Yes. momondo allows you to filter the results for Washington to London flights to just show those with flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Washington.

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

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Washington and alert you when they change.