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

Prices for flights from London Airport to Washington were last updated today.

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 travel and health documents required for your trip to Washington can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$189 Cheap Flights from London, Ontario to Washington in 2026

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 pm - 9:40 amYXU London-SEA Seattle/Tacoma Intl

18h 45m1 stop Calgary

7:35 pm - 5:20 amSEA Seattle/Tacoma Intl-YXU London

6h 45m1 stop Calgary

$349WestJet

Thu, Sep 24 - Mon, Sep 28

8:00 pm - 1:20 pmYXU London-SEA Seattle/Tacoma Intl

20h 20m1 stop Calgary

3:10 pm - 6:15 pmSEA Seattle/Tacoma Intl-YXU London

24h 05m1 stop Calgary

$376WestJet

Wed, Nov 18 - Thu, Dec 10

8:00 pm - 1:20 pmYXU London-SEA Seattle/Tacoma Intl

20h 20m1 stop Calgary

3:10 pm - 6:15 pmSEA Seattle/Tacoma Intl-YXU London

24h 05m1 stop Calgary

$376WestJet

Tue, Nov 17 - Thu, Dec 10

8:00 pm - 1:20 pmYXU London-SEA Seattle/Tacoma Intl

20h 20m1 stop Calgary

3:10 pm - 6:15 pmSEA Seattle/Tacoma Intl-YXU London

24h 05m1 stop Calgary

$376WestJet

Thu, Nov 19 - Thu, Dec 10

5:55 pm - 6:45 pmYXU London-SEA Seattle/Tacoma Intl

27h 50m1 stop Calgary

3:10 pm - 7:15 pmSEA Seattle/Tacoma Intl-YXU London

25h 05m1 stop Calgary

$380WestJet

Mon, Oct 19 - Wed, Oct 28

6:10 am - 6:45 pmYXU London-SEA Seattle/Tacoma Intl

15h 35m1 stop Calgary

10:30 am - 4:45 pmSEA Seattle/Tacoma Intl-YXU London

27h 15m1 stop Calgary

$384WestJet

Sun, Sep 27 - Sun, Oct 4

6:10 am - 6:45 pmYXU London-SEA Seattle/Tacoma Intl

15h 35m1 stop Calgary

7:35 pm - 5:20 amSEA Seattle/Tacoma Intl-YXU London

6h 45m1 stop Calgary

$394WestJet

Wed, Sep 9 - Sat, Sep 12

5:55 pm - 9:40 amYXU London-SEA Seattle/Tacoma Intl

18h 45m1 stop Calgary

7:35 pm - 5:20 amSEA Seattle/Tacoma Intl-YXU London

6h 45m1 stop Calgary

$404WestJet

Thu, Sep 24 - Mon, Sep 28

8:00 pm - 1:20 pmYXU London-SEA Seattle/Tacoma Intl

20h 20m1 stop Calgary

3:10 pm - 6:15 pmSEA Seattle/Tacoma Intl-YXU London

24h 05m1 stop Calgary

$406WestJet

Thu, Nov 26 - Tue, Jan 19

8:00 pm - 1:20 pmYXU London-SEA Seattle/Tacoma Intl

20h 20m1 stop Calgary

3:10 pm - 6:15 pmSEA Seattle/Tacoma Intl-YXU London

24h 05m1 stop Calgary

$406WestJet

Wed, Nov 25 - Tue, Jan 19

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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

Sep 24

YXU5:55 pmLondon

18h 45m

1 stop

SEA9:40 amSeattle/Tacoma Intl

Sep 28

SEA7:35 pmSeattle/Tacoma Intl

6h 45m

1 stop

YXU5:20 amLondon

$349

WestJet

Sep 24

YXU5:55 pmLondon

18h 45m

1 stop

SEA9:40 amSeattle/Tacoma Intl

Sep 28

SEA7:35 pmSeattle/Tacoma Intl

6h 45m

1 stop

YXU5:20 amLondon

$350

WestJet

Nov 17

YXU8:00 pmLondon

20h 20m

1 stop

SEA1:20 pmSeattle/Tacoma Intl

Dec 10

SEA3:10 pmSeattle/Tacoma Intl

24h 05m

1 stop

YXU6:15 pmLondon

$376

Delta flights from London, Ontario to State of Washington

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

Delta

Sep 24

YXU6:10 amLondon

13h 20m

2 stops

SEA4:30 pmSeattle/Tacoma Intl

Sep 28

SEA7:35 pmSeattle/Tacoma Intl

6h 45m

1 stop

YXU5:20 amLondon

$521

Delta

Sep 24

YXU6:10 amLondon

13h 20m

2 stops

SEA4:30 pmSeattle/Tacoma Intl

Sep 28

SEA7:35 pmSeattle/Tacoma Intl

6h 45m

1 stop

YXU5:20 amLondon

$538

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 London - SEA Seattle/Tacoma Intl

YXUSEA

London

Thu 9/24

5:55 pm-9:40 am

1 stop18h 45m

Seattle/Tacoma Intl

Mon 9/28

7:35 pm-5:20 am

1 stop6h 45m

$349

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 11/18

8:00 pm-1:20 pm

1 stop20h 20m

Seattle/Tacoma Intl

Thu 12/10

3:10 pm-6:15 pm

1 stop24h 05m

$376

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Tue 11/17

8:00 pm-1:20 pm

1 stop20h 20m

Seattle/Tacoma Intl

Thu 12/10

3:10 pm-6:15 pm

1 stop24h 05m

$376

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Thu 11/19

8:00 pm-1:20 pm

1 stop20h 20m

Seattle/Tacoma Intl

Thu 12/10

3:10 pm-6:15 pm

1 stop24h 05m

$376

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Mon 10/19

5:55 pm-6:45 pm

1 stop27h 50m

Seattle/Tacoma Intl

Wed 10/28

3:10 pm-7:15 pm

1 stop25h 05m

$380

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Sun 9/27

6:10 am-6:45 pm

1 stop15h 35m

Seattle/Tacoma Intl

Sun 10/4

10:30 am-4:45 pm

1 stop27h 15m

$384

Quickest round-trip

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 9/9

6:10 am-6:45 pm

1 stop15h 35m

Seattle/Tacoma Intl

Sat 9/12

7:35 pm-5:20 am

1 stop6h 45m

$394

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Thu 9/24

5:55 pm-9:40 am

1 stop18h 45m

Seattle/Tacoma Intl

Mon 9/28

7:35 pm-5:20 am

1 stop6h 45m

$404

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Thu 11/26

8:00 pm-1:20 pm

1 stop20h 20m

Seattle/Tacoma Intl

Tue 1/19

3:10 pm-6:15 pm

1 stop24h 05m

$406

LondonSeattle

YXU London - SEA Seattle/Tacoma Intl

YXUSEA

London

Wed 11/25

8:00 pm-1:20 pm

1 stop20h 20m

Seattle/Tacoma Intl

Tue 1/19

3:10 pm-6:15 pm

1 stop24h 05m

$406

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?

WestJet is the most popular carrier operating from London to Washington

What 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 traveling to State of Washington. Keep in mind that there are 5 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	12h 11m
Direct flights	None

The fastest flight from London, Ontario to State of Washington takes 12h 11m

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 were last updated today.
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 travel and health documents required for your trip to Washington can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

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

Finding the right flight to Washington from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Washington quick and easy, saving you time and money.

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

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

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

Once you have performed a search for London to Washington flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes. momondo can track prices for London to Washington flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.