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

WestJet, Air Canada, 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 39% 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.

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 3 operators available for flights from London Airport to Washington as of September 2025.

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$ 237 Cheap Flights from London to Washington in 2025

1 adult

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Find the cheapest flights from London, Ontario to Washington

Round-trip

One-way

Last minute

Cheap round-trip flights

6:15 a.m. - 2:16 p.m.YXU-SEA

11h 01m2 stops

8:00 p.m. - 9:46 a.m.SEA-YXU

10h 46m2 stops

C$ 445Air Canada

Find Deal

Sat, 25 Oct - Sat, 1 Nov

6:15 a.m. - 10:59 a.m.YXU-SEA

7h 44m1 stop

7:15 p.m. - 3:02 p.m.SEA-YXU

16h 47m2 stops

C$ 490Air Canada

Find Deal

Mon, 13 Oct - Fri, 24 Oct

6:00 a.m. - 10:25 a.m.YXU-SEA

31h 25m3 stops

11:55 a.m. - 8:12 p.m.SEA-YXU

29h 17m3 stops

C$ 630WestJet

Find Deal

Sat, 25 Oct - Sat, 1 Nov

6:00 a.m. - 12:59 p.m.YXU-SEA

9h 59m1 stop

3:20 p.m. - 8:12 p.m.SEA-YXU

25h 52m1 stop

C$ 633WestJet

Find Deal

Sat, 25 Oct - Sat, 1 Nov

6:00 a.m. - 12:59 p.m.YXU-SEA

9h 59m1 stop

11:55 a.m. - 8:12 p.m.SEA-YXU

29h 17m2 stops

C$ 643WestJet

Find Deal

Sat, 25 Oct - Sat, 1 Nov

6:00 a.m. - 10:25 a.m.YXU-SEA

31h 25m2 stops

11:55 a.m. - 8:12 p.m.SEA-YXU

29h 17m3 stops

C$ 654WestJet

Find Deal

Sat, 25 Oct - Sat, 1 Nov

3:40 p.m. - 9:45 p.m.YXU-SEA

9h 05m1 stop

12:41 p.m. - 6:05 p.m.SEA-YXU

26h 24m3 stops

C$ 661United Airlines

Find Deal

Sat, 25 Oct - Sat, 1 Nov

6:15 a.m. - 9:15 p.m.YXU-SEA

18h 00m3 stops

7:00 a.m. - 9:21 p.m.SEA-YXU

11h 21m2 stops

C$ 669United Airlines

Find Deal

Sat, 25 Oct - Sat, 1 Nov

6:15 a.m. - 2:16 p.m.YXU-SEA

11h 01m2 stops

7:15 p.m. - 3:02 p.m.SEA-YXU

16h 47m2 stops

C$ 679Air Canada

Find Deal

Mon, 13 Oct - Fri, 24 Oct

6:15 a.m. - 11:29 p.m.YXU-SEA

20h 14m2 stops

1:00 p.m. - 9:27 p.m.SEA-YXU

29h 27m3 stops

C$ 756United Airlines

Find Deal

Mon, 13 Oct - Fri, 24 Oct

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

25 Oct

YXU3:40 p.m.London

9h 05m

1 stop

SEA9:45 p.m.Seattle/Tacoma Intl

1 Nov

SEA12:41 p.m.Seattle/Tacoma Intl

26h 24m

3 stops

YXU6:05 p.m.London

C$ 661

Find similar

United Airlines

25 Oct

YXU6:15 a.m.London

18h 00m

3 stops

SEA9:15 p.m.Seattle/Tacoma Intl

1 Nov

SEA7:00 a.m.Seattle/Tacoma Intl

11h 21m

2 stops

YXU9:21 p.m.London

C$ 669

Find similar

United Airlines

13 Oct

YXU6:15 a.m.London

20h 14m

2 stops

SEA11:29 p.m.Seattle/Tacoma Intl

24 Oct

SEA1:00 p.m.Seattle/Tacoma Intl

29h 27m

3 stops

YXU9:27 p.m.London

C$ 756

Find similar

WestJet flights from London, Ontario to State of Washington

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

WestJet

25 Oct

YXU6:00 a.m.London

31h 25m

3 stops

SEA10:25 a.m.Seattle/Tacoma Intl

1 Nov

SEA11:55 a.m.Seattle/Tacoma Intl

29h 17m

3 stops

YXU8:12 p.m.London

C$ 630

Find similar

WestJet

25 Oct

YXU6:00 a.m.London

9h 59m

1 stop

SEA12:59 p.m.Seattle/Tacoma Intl

1 Nov

SEA3:20 p.m.Seattle/Tacoma Intl

25h 52m

1 stop

YXU8:12 p.m.London

C$ 633

Find similar

WestJet

25 Oct

YXU6:00 a.m.London

9h 59m

1 stop

SEA12:59 p.m.Seattle/Tacoma Intl

1 Nov

SEA11:55 a.m.Seattle/Tacoma Intl

29h 17m

2 stops

YXU8:12 p.m.London

C$ 643

Find similar

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

LondonSeattle

YXU - SEA

YXUSEA

London

Sat 25/10

6:15 a.m.-2:16 p.m.

2 stops11h 01m

Seattle/Tacoma Intl

Sat 1/11

8:00 p.m.-9:46 a.m.

2 stops10h 46m

C$ 445

LondonSeattle

YXU - SEA

YXUSEA

London

Mon 13/10

6:15 a.m.-10:59 a.m.

1 stop7h 44m

Seattle/Tacoma Intl

Fri 24/10

7:15 p.m.-3:02 p.m.

2 stops16h 47m

C$ 490

LondonSeattle

YXU - SEA

YXUSEA

London

Sat 25/10

6:00 a.m.-10:25 a.m.

3 stops31h 25m

Seattle/Tacoma Intl

Sat 1/11

11:55 a.m.-8:12 p.m.

3 stops29h 17m

C$ 630

LondonSeattle

YXU - SEA

YXUSEA

London

Sat 25/10

6:00 a.m.-12:59 p.m.

1 stop9h 59m

Seattle/Tacoma Intl

Sat 1/11

3:20 p.m.-8:12 p.m.

1 stop25h 52m

C$ 633

LondonSeattle

YXU - SEA

YXUSEA

London

Sat 25/10

6:00 a.m.-12:59 p.m.

1 stop9h 59m

Seattle/Tacoma Intl

Sat 1/11

11:55 a.m.-8:12 p.m.

2 stops29h 17m

C$ 643

LondonSeattle

YXU - SEA

YXUSEA

London

Sat 25/10

6:00 a.m.-10:25 a.m.

2 stops31h 25m

Seattle/Tacoma Intl

Sat 1/11

11:55 a.m.-8:12 p.m.

3 stops29h 17m

C$ 654

LondonSeattle

YXU - SEA

YXUSEA

London

Sat 25/10

3:40 p.m.-9:45 p.m.

1 stop9h 05m

Seattle/Tacoma Intl

Sat 1/11

12:41 p.m.-6:05 p.m.

3 stops26h 24m

C$ 661

LondonSeattle

YXU - SEA

YXUSEA

London

Sat 25/10

6:15 a.m.-9:15 p.m.

3 stops18h 00m

Seattle/Tacoma Intl

Sat 1/11

7:00 a.m.-9:21 p.m.

2 stops11h 21m

C$ 669

LondonSeattle

YXU - SEA

YXUSEA

London

Mon 13/10

6:15 a.m.-2:16 p.m.

2 stops11h 01m

Seattle/Tacoma Intl

Fri 24/10

7:15 p.m.-3:02 p.m.

2 stops16h 47m

C$ 679

LondonSeattle

YXU - SEA

YXUSEA

London

Mon 13/10

6:15 a.m.-11:29 p.m.

2 stops20h 14m

Seattle/Tacoma Intl

Fri 24/10

1:00 p.m.-9:27 p.m.

3 stops29h 27m

C$ 756

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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

Prices

Airlines

What is the cheapest day to depart on your flight to State of Washington?

On average, the least expensive day to fly to State of Washington from London, Ontario is on a Friday. momondo users have found tickets for Friday departures for as low as C$ 371. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to State of Washington on Saturday is C$ 706.

What is the cheapest time of day to depart on your flight to State of Washington?

According to our data, the cheapest time of day to fly to State of Washington is in the afternoon. momondo users have found flights departing from London, Ontario to State of Washington in the afternoon for as low as C$ 559. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 567 on average. Flights to State of Washington from London, Ontario in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

Direct flights	None

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

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 3 operators available for flights from London Airport to Washington as of September 2025.
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$ 243	Free Cancellation	Rating 7.2 3,091 reviews	Search WestJet flights
United Airlines	PriceFrom C$ 279	Free Cancellation	Rating 7.4 8,937 reviews	Search United Airlines flights
Air Canada	PriceFrom C$ 366	Free Cancellation	Rating 7.1 10,000 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.

An easier way to manage your State of Washington 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.

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Cheap flights from London, Ontario to Washington from C$ 237

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London, Ontario to Washington departing on 26/10. 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, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

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Price Alerts

Find the cheapest flights from London, Ontario to Washington

Cheap round-trip flights

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United Airlines flights from London, Ontario to State of Washington

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

WestJet flights from London, Ontario to State of Washington

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

momondo Fare Finder

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

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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 day to depart on your flight to State of Washington?

What is the cheapest time of day to depart on your flight to State of Washington?

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

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

Which airlines fly to State of Washington?

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

Direct flights

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

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

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

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

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

Why use momondo?

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

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

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

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

An easier way to manage your State of Washington 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 Washington

Popular Cities in Washington

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