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Cheap flights from London, Ontario to Washington from C$ 343

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 16/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from London, Ontario to Washington

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
8:10 p.m. - 2:20 p.m.YXU-SEA
21h 10m1 stop
WestJet Logo
3:10 p.m. - 6:34 a.m.SEA-YXU
12h 24m1 stop
C$ 742WestJet
Find Deal
Wed, 17 Dec - Wed, 24 Dec
Air Canada Logo
9:25 a.m. - 10:16 p.m.YXU-SEA
15h 51m1 stop
Air Canada Logo
8:00 p.m. - 5:05 p.m.SEA-YXU
18h 05m2 stops
C$ 757Air Canada
Find Deal
Wed, 17 Dec - Wed, 24 Dec
Air Canada Logo
9:25 a.m. - 7:18 p.m.YXU-SEA
12h 53m2 stops
Air Canada Logo
8:00 p.m. - 8:43 a.m.SEA-YXU
9h 43m2 stops
C$ 766Air Canada
Find Deal
Tue, 28 Apr - Wed, 29 Apr
WestJet Logo
8:10 p.m. - 4:46 p.m.YXU-SEA
23h 36m2 stops
WestJet Logo
3:10 p.m. - 6:34 a.m.SEA-YXU
12h 24m1 stop
C$ 797WestJet
Find Deal
Thu, 11 Dec - Thu, 18 Dec
Air Canada Logo
9:25 a.m. - 9:51 p.m.YXU-SEA
15h 26m1 stop
Air Canada Logo
8:00 p.m. - 8:43 a.m.SEA-YXU
9h 43m2 stops
C$ 815Air Canada
Find Deal
Tue, 28 Apr - Wed, 29 Apr
Air Canada Logo
5:10 a.m. - 2:40 p.m.YXU-PDX
12h 30m2 stops
Air Canada Logo
7:00 p.m. - 8:46 a.m.PDX-YXU
10h 46m2 stops
C$ 829Air Canada
Find Deal
Sun, 22 Feb - Thu, 26 Feb
United Airlines Logo
9:25 a.m. - 10:18 p.m.YXU-SEA
15h 53m3 stops
United Airlines Logo
7:00 a.m. - 9:18 p.m.SEA-YXU
11h 18m2 stops
C$ 857United Airlines
Find Deal
Tue, 28 Apr - Wed, 29 Apr
United Airlines Logo
9:25 a.m. - 10:16 p.m.YXU-SEA
15h 51m1 stop
United Airlines Logo
1:35 p.m. - 5:05 p.m.SEA-YXU
24h 30m3 stops
C$ 873United Airlines
Find Deal
Wed, 17 Dec - Wed, 24 Dec
United Airlines Logo
5:10 a.m. - 9:46 p.m.YXU-SEA
19h 36m2 stops
United Airlines Logo
5:02 a.m. - 8:46 a.m.SEA-YXU
24h 44m2 stops
C$ 929United Airlines
Find Deal
Thu, 11 Dec - Thu, 18 Dec
WestJet Logo
8:10 p.m. - 10:22 a.m.YXU-SEA
17h 12m3 stops
WestJet Logo
9:32 a.m. - 6:34 a.m.SEA-YXU
18h 02m3 stops
C$ 1,238WestJet
Find Deal
Thu, 11 Dec - Thu, 18 Dec

WestJet flights from London, Ontario to State of Washington

Our best WestJet deals on London, Ontario to State of Washington flight tickets
WestJet
17 Dec
YXU8:10 p.m.London
21h 10m
1 stop
SEA2:20 p.m.Seattle/Tacoma Intl
24 Dec
SEA3:10 p.m.Seattle/Tacoma Intl
12h 24m
1 stop
YXU6:34 a.m.London
C$ 742
Find similar
WestJet
11 Dec
YXU8:10 p.m.London
23h 36m
2 stops
SEA4:46 p.m.Seattle/Tacoma Intl
18 Dec
SEA3:10 p.m.Seattle/Tacoma Intl
12h 24m
1 stop
YXU6:34 a.m.London
C$ 797
Find similar
WestJet
11 Dec
YXU8:10 p.m.London
17h 12m
3 stops
SEA10:22 a.m.Seattle/Tacoma Intl
18 Dec
SEA9:32 a.m.Seattle/Tacoma Intl
18h 02m
3 stops
YXU6:34 a.m.London
C$ 1,238
Find similar

Air Canada flights from London, Ontario to State of Washington

Our best Air Canada deals on London, Ontario to State of Washington flight tickets
Air Canada
17 Dec
YXU9:25 a.m.London
15h 51m
1 stop
SEA10:16 p.m.Seattle/Tacoma Intl
24 Dec
SEA8:00 p.m.Seattle/Tacoma Intl
18h 05m
2 stops
YXU5:05 p.m.London
C$ 756
Find similar
Air Canada
28 Apr
YXU9:25 a.m.London
12h 53m
2 stops
SEA7:18 p.m.Seattle/Tacoma Intl
29 Apr
SEA8:00 p.m.Seattle/Tacoma Intl
9h 43m
2 stops
YXU8:43 a.m.London
C$ 766
Find similar
Air Canada
28 Apr
YXU9:25 a.m.London
15h 26m
1 stop
SEA9:51 p.m.Seattle/Tacoma Intl
29 Apr
SEA8:00 p.m.Seattle/Tacoma Intl
9h 43m
2 stops
YXU8:43 a.m.London
C$ 815
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from London, Ontario to State of Washington that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 96,600 searches. Data last updated 3 November 2025.
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

Wed 17/12

8:10 p.m.-2:20 p.m.

1 stop21h 10m

Seattle/Tacoma Intl

Wed 24/12

3:10 p.m.-6:34 a.m.

1 stop12h 24m

C$ 742

LondonSeattle

YXU - SEA

YXUSEA

London

Wed 17/12

9:25 a.m.-10:16 p.m.

1 stop15h 51m

Seattle/Tacoma Intl

Wed 24/12

8:00 p.m.-5:05 p.m.

2 stops18h 05m

C$ 756

LondonSeattle

YXU - SEA

YXUSEA

London

Tue 28/4

9:25 a.m.-7:18 p.m.

2 stops12h 53m

Seattle/Tacoma Intl

Wed 29/4

8:00 p.m.-8:43 a.m.

2 stops9h 43m

C$ 766

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 11/12

8:10 p.m.-4:46 p.m.

2 stops23h 36m

Seattle/Tacoma Intl

Thu 18/12

3:10 p.m.-6:34 a.m.

1 stop12h 24m

C$ 797

LondonSeattle

YXU - SEA

YXUSEA

London

Tue 28/4

9:25 a.m.-9:51 p.m.

1 stop15h 26m

Seattle/Tacoma Intl

Wed 29/4

8:00 p.m.-8:43 a.m.

2 stops9h 43m

C$ 815

LondonPortland

YXU - PDX

YXUPDX

London

Sun 22/2

5:10 a.m.-2:40 p.m.

2 stops12h 30m

Portland

Thu 26/2

7:00 p.m.-8:46 a.m.

2 stops10h 46m

C$ 829

LondonSeattle

YXU - SEA

YXUSEA

London

Tue 28/4

9:25 a.m.-10:18 p.m.

3 stops15h 53m

Seattle/Tacoma Intl

Wed 29/4

7:00 a.m.-9:18 p.m.

2 stops11h 18m

C$ 857

LondonSeattle

YXU - SEA

YXUSEA

London

Wed 17/12

9:25 a.m.-10:16 p.m.

1 stop15h 51m

Seattle/Tacoma Intl

Wed 24/12

1:35 p.m.-5:05 p.m.

3 stops24h 30m

C$ 873

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 11/12

5:10 a.m.-9:46 p.m.

2 stops19h 36m

Seattle/Tacoma Intl

Thu 18/12

5:02 a.m.-8:46 a.m.

2 stops24h 44m

C$ 929

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 11/12

8:10 p.m.-10:22 a.m.

3 stops17h 12m

Seattle/Tacoma Intl

Thu 18/12

9:32 a.m.-6:34 a.m.

3 stops18h 02m

C$ 1,238

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to Washington from

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?

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$ 375. 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$ 714.

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$ 565. 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$ 574 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?

  • 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
WestJetPriceFrom C$ 244Free CancellationRating
7.2
3,153 reviews
Search WestJet flights
United AirlinesPriceFrom C$ 282Free CancellationRating
7.4
8,997 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 374Free CancellationRating
7.1
10,398 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.

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