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

Prices for flights from London Airport to Washington are refreshed on a daily basis.

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

There are 2 operators available for flights from London Airport to Washington as of May 2026.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Airport to Washington.

What documentation or ID do you need to fly to Washington?

The required travel and health documents for your Washington 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 Washington. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

C$ 337 Cheap Flights from London, Ontario to Washington in 2026

1 adult

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from London, Ontario to Washington

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

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

YXU

SEA

18h 45m

1 stop

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

SEA

YXU

6h 45m

1 stop

C$ 347WestJet

Sun, 26 Jul - Wed, 29 Jul

2:40 p.m. - 9:40 a.m.

YXU

SEA

22h 00m

2 stops

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

SEA

YXU

6h 45m

1 stop

C$ 514WestJet

Sun, 26 Jul - Wed, 29 Jul

6:10 a.m. - 1:50 p.m.

YXU

PDX

10h 40m

1 stop

2:30 p.m. - 5:20 a.m.

PDX

YXU

11h 50m

1 stop

C$ 533WestJet

Tue, 11 Aug - Wed, 12 Aug

6:10 a.m. - 1:50 p.m.

YXU

PDX

10h 40m

1 stop

2:30 p.m. - 7:50 p.m.

PDX

YXU

26h 20m

1 stop

C$ 535WestJet

Tue, 11 Aug - Wed, 12 Aug

6:10 a.m. - 1:50 p.m.

YXU

PDX

10h 40m

1 stop

2:30 p.m. - 5:20 a.m.

PDX

YXU

11h 50m

1 stop

C$ 536WestJet

Tue, 11 Aug - Wed, 12 Aug

3:30 p.m. - 9:08 p.m.

YXU

SEA

8h 38m

1 stop

3:00 p.m. - 9:18 a.m.

SEA

YXU

15h 18m

2 stops

C$ 668Air Canada

Tue, 9 Jun - Wed, 10 Jun

3:30 p.m. - 9:08 p.m.

YXU

SEA

8h 38m

1 stop

7:20 p.m. - 5:33 p.m.

SEA

YXU

19h 13m

2 stops

C$ 695Air Canada

Tue, 9 Jun - Wed, 10 Jun

6:10 a.m. - 1:50 p.m.

YXU

PDX

10h 40m

1 stop

5:45 p.m. - 5:20 a.m.

PDX

YXU

8h 35m

2 stops

C$ 718Delta

Tue, 11 Aug - Wed, 12 Aug

6:10 a.m. - 1:50 p.m.

YXU

PDX

10h 40m

1 stop

5:54 p.m. - 5:20 a.m.

PDX

YXU

8h 26m

2 stops

C$ 725Delta

Tue, 11 Aug - Wed, 12 Aug

5:10 a.m. - 11:32 p.m.

YXU

SEA

21h 22m

3 stops

5:15 p.m. - 2:58 p.m.

SEA

YXU

18h 43m

2 stops

C$ 812United Airlines

Tue, 9 Jun - Wed, 10 Jun

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WestJet flights from London, Ontario to State of Washington

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

WestJet

26 Jul

YXU5:55 p.m.London

18h 45m

1 stop

SEA9:40 a.m.Seattle/Tacoma Intl

29 Jul

SEA7:35 p.m.Seattle/Tacoma Intl

6h 45m

1 stop

YXU5:20 a.m.London

C$ 347

WestJet

26 Jul

YXU2:40 p.m.London

22h 00m

2 stops

SEA9:40 a.m.Seattle/Tacoma Intl

29 Jul

SEA7:35 p.m.Seattle/Tacoma Intl

6h 45m

1 stop

YXU5:20 a.m.London

C$ 514

WestJet

11 Aug

YXU6:10 a.m.London

10h 40m

1 stop

PDX1:50 p.m.Portland

12 Aug

PDX2:30 p.m.Portland

11h 50m

1 stop

YXU5:20 a.m.London

C$ 533

United Airlines flights from London, Ontario to State of Washington

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

United Airlines

9 Jun

YXU5:10 a.m.London

21h 22m

3 stops

SEA11:32 p.m.Seattle/Tacoma Intl

10 Jun

SEA5:15 p.m.Seattle/Tacoma Intl

18h 43m

2 stops

YXU2:58 p.m.London

C$ 812

United Airlines

9 Jun

YXU5:10 a.m.London

21h 22m

3 stops

SEA11:32 p.m.Seattle/Tacoma Intl

10 Jun

SEA5:00 p.m.Seattle/Tacoma Intl

18h 58m

2 stops

YXU2:58 p.m.London

C$ 871

United Airlines

26 Jul

YXU5:10 a.m.London

21h 00m

2 stops

SEA11:10 p.m.Seattle/Tacoma Intl

29 Jul

SEA5:00 p.m.Seattle/Tacoma Intl

21h 45m

3 stops

YXU5:45 p.m.London

C$ 926

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonSeattle

YXU - SEA

YXUSEA

London

Sun 26/7

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

1 stop18h 45m

Seattle/Tacoma Intl

Wed 29/7

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

1 stop6h 45m

C$ 347

LondonSeattle

YXU - SEA

YXUSEA

London

Sun 26/7

2:40 p.m.-9:40 a.m.

2 stops22h 00m

Seattle/Tacoma Intl

Wed 29/7

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

1 stop6h 45m

C$ 514

LondonPortland

YXU - PDX

YXUPDX

London

Tue 11/8

6:10 a.m.-1:50 p.m.

1 stop10h 40m

Portland

Wed 12/8

2:30 p.m.-5:20 a.m.

1 stop11h 50m

C$ 533

LondonPortland

YXU - PDX

YXUPDX

London

Tue 11/8

6:10 a.m.-1:50 p.m.

1 stop10h 40m

Portland

Wed 12/8

2:30 p.m.-7:50 p.m.

1 stop26h 20m

C$ 535

LondonPortland

YXU - PDX

YXUPDX

London

Tue 11/8

6:10 a.m.-1:50 p.m.

1 stop10h 40m

Portland

Wed 12/8

2:30 p.m.-5:20 a.m.

1 stop11h 50m

C$ 536

LondonSeattle

YXU - SEA

YXUSEA

London

Tue 9/6

3:30 p.m.-9:08 p.m.

1 stop8h 38m

Seattle/Tacoma Intl

Wed 10/6

3:00 p.m.-9:18 a.m.

2 stops15h 18m

C$ 668

LondonSeattle

YXU - SEA

YXUSEA

London

Tue 9/6

3:30 p.m.-9:08 p.m.

1 stop8h 38m

Seattle/Tacoma Intl

Wed 10/6

7:20 p.m.-5:33 p.m.

2 stops19h 13m

C$ 695

LondonPortland

YXU - PDX

YXUPDX

London

Tue 11/8

6:10 a.m.-1:50 p.m.

1 stop10h 40m

Portland

Wed 12/8

5:45 p.m.-5:20 a.m.

2 stops8h 35m

C$ 718

Quickest round-trip

LondonPortland

YXU - PDX

YXUPDX

London

Tue 11/8

6:10 a.m.-1:50 p.m.

1 stop10h 40m

Portland

Wed 12/8

5:54 p.m.-5:20 a.m.

2 stops8h 26m

C$ 725

LondonSeattle

YXU - SEA

YXUSEA

London

Tue 9/6

5:10 a.m.-11:32 p.m.

3 stops21h 22m

Seattle/Tacoma Intl

Wed 10/6

5:15 p.m.-2:58 p.m.

2 stops18h 43m

C$ 812

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 London, Ontario to State of Washington

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 airline that flies from London to Washington?

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

Which airlines fly to State of Washington?

Alaska Airlines, Air Canada and WestJet are the top three most popular airlines that fly to State of Washington from London, Ontario according to our data. Alaska Airlines is the first choice among our users, with 40% of people opting to fly with this airline when travelling to State of Washington. Keep in mind that there are 6 different airlines that fly to State of Washington on a routine basis, so you have a few additional options to choose from.

Cheap London, Ontario to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London, Ontario to State of Washington

Fastest flight time	8h 38m
Direct flights	None

The fastest flight from London, Ontario to State of Washington takes 8h 38m

There are no direct flights from London, Ontario to State of Washington. There are no popular flight routes from London, Ontario to State of Washington.

Search flight deals

Frequently asked questions about flying from London, Ontario to Washington

When did momondo last update prices for flights from London Airport to Washington?
Prices for flights from London Airport to Washington are refreshed on a daily basis.
How many operators does momondo search for flights from London Airport to Washington?
There are 2 operators available for flights from London Airport to Washington as of May 2026.
How old do you have to be to fly from London Airport to Washington?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Airport to Washington.
What documentation or ID do you need to fly to Washington?
The required travel and health documents for your Washington 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 Washington. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from London, Ontario to State of Washington

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

Airline	Rating	Free Cancellation	Price
WestJet	PriceFrom C$ 269	Free Cancellation	Rating 7.2 3,331 reviews		Search WestJet flights
Air Canada	PriceFrom C$ 363	Free Cancellation	Rating 7.1 10,998 reviews		Search Air Canada flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Washington . Millions of users trust and use momondo every year so you are in good hands.

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

momondo does allow users to show only those flights to Washington from London which offer a flexible booking policy as well as other useful filters and features.

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

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 Washington from London.

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

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