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 March 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$ 336 Cheap Flights from London to Washington in 2026

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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. - 6:45 p.m.

YXU

SEA

27h 50m

1 stop

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

SEA

YXU

6h 45m

1 stop

C$ 558WestJet

Thu, 30 Apr - Mon, 4 May

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

YXU

SEA

15h 35m

1 stop

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

SEA

YXU

6h 45m

1 stop

C$ 568WestJet

Fri, 5 Jun - Tue, 9 Jun

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$ 656WestJet

Thu, 30 Apr - Mon, 4 May

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

YXU

SEA

27h 50m

1 stop

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

SEA

YXU

6h 45m

1 stop

C$ 657WestJet

Thu, 30 Apr - Mon, 4 May

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

YXU

SEA

8h 38m

1 stop

7:20 p.m. - 11:43 a.m.

SEA

YXU

13h 23m

2 stops

C$ 658Air Canada

Fri, 5 Jun - Tue, 9 Jun

9:25 a.m. - 9:53 p.m.

YXU

SEA

15h 28m

1 stop

7:20 p.m. - 8:53 a.m.

SEA

YXU

10h 33m

2 stops

C$ 667Air Canada

Thu, 30 Apr - Mon, 4 May

9:25 a.m. - 9:53 p.m.

YXU

SEA

15h 28m

1 stop

7:20 p.m. - 8:53 a.m.

SEA

YXU

10h 33m

2 stops

C$ 668Air Canada

Thu, 30 Apr - Mon, 4 May

9:25 a.m. - 10:47 p.m.

YXU

SEA

16h 22m

2 stops

7:05 p.m. - 5:33 p.m.

SEA

YXU

19h 28m

2 stops

C$ 717United Airlines

Thu, 30 Apr - Mon, 4 May

9:25 a.m. - 11:59 p.m.

YXU

SEA

17h 34m

2 stops

7:00 a.m. - 9:38 p.m.

SEA

YXU

11h 38m

2 stops

C$ 719United Airlines

Thu, 30 Apr - Mon, 4 May

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

YXU

PDX

10h 40m

1 stop

6:05 p.m. - 5:20 a.m.

PDX

YXU

8h 15m

2 stops

C$ 1,065Delta

Fri, 1 May - Tue, 5 May

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

30 Apr

YXU9:25 a.m.London

16h 22m

2 stops

SEA10:47 p.m.Seattle/Tacoma Intl

4 May

SEA7:05 p.m.Seattle/Tacoma Intl

19h 28m

2 stops

YXU5:33 p.m.London

C$ 717

United Airlines

30 Apr

YXU9:25 a.m.London

17h 34m

2 stops

SEA11:59 p.m.Seattle/Tacoma Intl

4 May

SEA7:00 a.m.Seattle/Tacoma Intl

11h 38m

2 stops

YXU9:38 p.m.London

C$ 719

United Airlines

5 Jun

YXU9:30 a.m.London

12h 36m

2 stops

SEA7:06 p.m.Seattle/Tacoma Intl

9 Jun

SEA7:40 a.m.Seattle/Tacoma Intl

10h 58m

2 stops

YXU9:38 p.m.London

C$ 744

WestJet flights from London, Ontario to State of Washington

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

WestJet

5 Jun

YXU5:55 p.m.London

18h 45m

1 stop

SEA9:40 a.m.Seattle/Tacoma Intl

9 Jun

SEA7:35 p.m.Seattle/Tacoma Intl

6h 45m

1 stop

YXU5:20 a.m.London

C$ 568

WestJet

30 Apr

YXU5:55 p.m.London

18h 45m

1 stop

SEA9:40 a.m.Seattle/Tacoma Intl

4 May

SEA7:35 p.m.Seattle/Tacoma Intl

6h 45m

1 stop

YXU5:20 a.m.London

C$ 656

WestJet

30 Apr

YXU5:55 p.m.London

27h 50m

1 stop

SEA6:45 p.m.Seattle/Tacoma Intl

4 May

SEA7:35 p.m.Seattle/Tacoma Intl

6h 45m

1 stop

YXU5:20 a.m.London

C$ 657

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

Thu 30/4

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

1 stop27h 50m

Seattle/Tacoma Intl

Mon 4/5

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

1 stop6h 45m

C$ 558

LondonSeattle

YXU - SEA

YXUSEA

London

Fri 5/6

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

1 stop15h 35m

Seattle/Tacoma Intl

Tue 9/6

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

1 stop6h 45m

C$ 568

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 30/4

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

1 stop18h 45m

Seattle/Tacoma Intl

Mon 4/5

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

1 stop6h 45m

C$ 656

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 30/4

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

1 stop27h 50m

Seattle/Tacoma Intl

Mon 4/5

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

1 stop6h 45m

C$ 657

LondonSeattle

YXU - SEA

YXUSEA

London

Fri 5/6

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

1 stop8h 38m

Seattle/Tacoma Intl

Tue 9/6

7:20 p.m.-11:43 a.m.

2 stops13h 23m

C$ 658

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 30/4

9:25 a.m.-9:53 p.m.

1 stop15h 28m

Seattle/Tacoma Intl

Mon 4/5

7:20 p.m.-8:53 a.m.

2 stops10h 33m

C$ 667

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 30/4

9:25 a.m.-9:53 p.m.

1 stop15h 28m

Seattle/Tacoma Intl

Mon 4/5

7:20 p.m.-8:53 a.m.

2 stops10h 33m

C$ 668

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 30/4

9:25 a.m.-10:47 p.m.

2 stops16h 22m

Seattle/Tacoma Intl

Mon 4/5

7:05 p.m.-5:33 p.m.

2 stops19h 28m

C$ 717

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 30/4

9:25 a.m.-11:59 p.m.

2 stops17h 34m

Seattle/Tacoma Intl

Mon 4/5

7:00 a.m.-9:38 p.m.

2 stops11h 38m

C$ 719

Quickest round-trip

LondonPortland

YXU - PDX

YXUPDX

London

Fri 1/5

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

1 stop10h 40m

Portland

Tue 5/5

6:05 p.m.-5:20 a.m.

2 stops8h 15m

C$ 1,065

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

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

Air Canada, United Airlines, and Delta 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.

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

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 March 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$ 240	Free Cancellation	Rating 7.2 3,300 reviews	Search WestJet flights
United Airlines	PriceFrom C$ 276	Free Cancellation	Rating 7.4 9,462 reviews	Search United Airlines flights
Air Canada	PriceFrom C$ 366	Free Cancellation	Rating 7.1 10,835 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.