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Cheap flights from London, Ontario to Washington from C$ 242

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 30/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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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.
United Airlines Logo
5:40 p.m. - 10:16 p.m.
YXU
-
SEA
7h 36m1 stop
United Airlines Logo
8:10 a.m. - 9:21 p.m.
SEA
-
YXU
10h 11m2 stops
C$ 428United Airlines
Fri, 30 Jan - Fri, 6 Feb
United Airlines Logo
5:10 a.m. - 6:27 p.m.
YXU
-
SEA
16h 17m2 stops
United Airlines Logo
12:35 p.m. - 5:05 p.m.
SEA
-
YXU
25h 30m3 stops
C$ 437United Airlines
Fri, 30 Jan - Fri, 6 Feb
United Airlines Logo
5:40 p.m. - 10:16 p.m.
YXU
-
SEA
7h 36m1 stop
United Airlines Logo
8:10 a.m. - 9:21 p.m.
SEA
-
YXU
10h 11m1 stop
C$ 478United Airlines
Fri, 30 Jan - Fri, 6 Feb
United Airlines Logo
5:10 a.m. - 9:12 p.m.
YXU
-
SEA
19h 02m2 stops
United Airlines Logo
7:00 a.m. - 9:21 p.m.
SEA
-
YXU
11h 21m2 stops
C$ 564United Airlines
Tue, 13 Jan - Tue, 20 Jan
United Airlines Logo
5:10 a.m. - 9:12 p.m.
YXU
-
SEA
19h 02m3 stops
United Airlines Logo
12:35 p.m. - 5:05 p.m.
SEA
-
YXU
25h 30m3 stops
C$ 605United Airlines
Tue, 13 Jan - Tue, 20 Jan
United Airlines Logo
5:40 p.m. - 10:16 p.m.
YXU
-
SEA
7h 36m1 stop
United Airlines Logo
5:00 a.m. - 5:05 p.m.
SEA
-
YXU
9h 05m2 stops
C$ 681United Airlines
Tue, 13 Jan - Tue, 20 Jan
WestJet Logo
8:10 p.m. - 2:19 p.m.
YXU
-
SEA
21h 09m1 stop
WestJet Logo
3:10 p.m. - 6:35 a.m.
SEA
-
YXU
12h 25m1 stop
C$ 723WestJet
Mon, 2 Mar - Wed, 4 Mar
Air Canada Logo
9:25 a.m. - 7:16 p.m.
YXU
-
SEA
12h 51m2 stops
Air Canada Logo
5:50 a.m. - 9:21 p.m.
SEA
-
YXU
12h 31m2 stops
C$ 738Air Canada
Mon, 2 Mar - Wed, 4 Mar
Air Canada Logo
9:25 a.m. - 7:16 p.m.
YXU
-
SEA
12h 51m2 stops
Air Canada Logo
5:50 a.m. - 9:21 p.m.
SEA
-
YXU
12h 31m2 stops
C$ 748Air Canada
Mon, 2 Mar - Wed, 4 Mar
Air Canada Logo
5:40 p.m. - 10:16 p.m.
YXU
-
SEA
7h 36m1 stop
Air Canada Logo
8:00 p.m. - 8:46 a.m.
SEA
-
YXU
9h 46m2 stops
C$ 765Air Canada
Mon, 2 Mar - Wed, 4 Mar

WestJet flights from London, Ontario to State of Washington

Our best WestJet deals on London, Ontario to State of Washington flight tickets
WestJet
2 Mar
YXU8:10 p.m.London
21h 09m
1 stop
SEA2:19 p.m.Seattle/Tacoma Intl
4 Mar
SEA3:10 p.m.Seattle/Tacoma Intl
12h 25m
1 stop
YXU6:35 a.m.London
C$ 723
Find similar
WestJet
2 Mar
YXU8:10 p.m.London
21h 09m
1 stop
SEA2:19 p.m.Seattle/Tacoma Intl
4 Mar
SEA3:10 p.m.Seattle/Tacoma Intl
12h 25m
1 stop
YXU6:35 a.m.London
C$ 772
Find similar
WestJet
13 Jan
YXU8:10 p.m.London
21h 10m
1 stop
SEA2:20 p.m.Seattle/Tacoma Intl
20 Jan
SEA3:10 p.m.Seattle/Tacoma Intl
12h 24m
1 stop
YXU6:34 a.m.London
C$ 1,473
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
2 Mar
YXU9:25 a.m.London
12h 51m
2 stops
SEA7:16 p.m.Seattle/Tacoma Intl
4 Mar
SEA5:50 a.m.Seattle/Tacoma Intl
12h 31m
2 stops
YXU9:21 p.m.London
C$ 738
Find similar
Air Canada
2 Mar
YXU9:25 a.m.London
12h 51m
2 stops
SEA7:16 p.m.Seattle/Tacoma Intl
4 Mar
SEA5:50 a.m.Seattle/Tacoma Intl
12h 31m
2 stops
YXU9:21 p.m.London
C$ 748
Find similar
Air Canada
2 Mar
YXU5:10 a.m.London
12h 51m
2 stops
SEA3:01 p.m.Seattle/Tacoma Intl
4 Mar
SEA5:50 a.m.Seattle/Tacoma Intl
12h 31m
2 stops
YXU9:21 p.m.London
C$ 759
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 18 December 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

Fri 30/1

5:40 p.m.-10:16 p.m.

1 stop7h 36m

Seattle/Tacoma Intl

Fri 6/2

8:10 a.m.-9:21 p.m.

2 stops10h 11m

C$ 428

LondonSeattle

YXU - SEA

YXUSEA

London

Fri 30/1

5:10 a.m.-6:27 p.m.

2 stops16h 17m

Seattle/Tacoma Intl

Fri 6/2

12:35 p.m.-5:05 p.m.

3 stops25h 30m

C$ 437

LondonSeattle

YXU - SEA

YXUSEA

London

Fri 30/1

5:40 p.m.-10:16 p.m.

1 stop7h 36m

Seattle/Tacoma Intl

Fri 6/2

8:10 a.m.-9:21 p.m.

1 stop10h 11m

C$ 478

LondonSeattle

YXU - SEA

YXUSEA

London

Tue 13/1

5:10 a.m.-9:12 p.m.

2 stops19h 02m

Seattle/Tacoma Intl

Tue 20/1

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

2 stops11h 21m

C$ 564

LondonSeattle

YXU - SEA

YXUSEA

London

Tue 13/1

5:10 a.m.-9:12 p.m.

3 stops19h 02m

Seattle/Tacoma Intl

Tue 20/1

12:35 p.m.-5:05 p.m.

3 stops25h 30m

C$ 605

LondonSeattle

YXU - SEA

YXUSEA

London

Tue 13/1

5:40 p.m.-10:16 p.m.

1 stop7h 36m

Seattle/Tacoma Intl

Tue 20/1

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

2 stops9h 05m

C$ 681

LondonSeattle

YXU - SEA

YXUSEA

London

Mon 2/3

8:10 p.m.-2:19 p.m.

1 stop21h 09m

Seattle/Tacoma Intl

Wed 4/3

3:10 p.m.-6:35 a.m.

1 stop12h 25m

C$ 723

LondonSeattle

YXU - SEA

YXUSEA

London

Mon 2/3

9:25 a.m.-7:16 p.m.

2 stops12h 51m

Seattle/Tacoma Intl

Wed 4/3

5:50 a.m.-9:21 p.m.

2 stops12h 31m

C$ 738

LondonSeattle

YXU - SEA

YXUSEA

London

Mon 2/3

9:25 a.m.-7:16 p.m.

2 stops12h 51m

Seattle/Tacoma Intl

Wed 4/3

5:50 a.m.-9:21 p.m.

2 stops12h 31m

C$ 748

LondonSeattle

YXU - SEA

YXUSEA

London

Mon 2/3

5:40 p.m.-10:16 p.m.

1 stop7h 36m

Seattle/Tacoma Intl

Wed 4/3

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

2 stops9h 46m

C$ 765

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 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$ 369. 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$ 703.

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$ 556. 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$ 564 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

Fastest flight time

7h 36m

Direct flights

None
The fastest flight from London, Ontario to State of Washington takes 7h 36m
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$ 240Free CancellationRating
7.2
3,204 reviews
Search WestJet flights
United AirlinesPriceFrom C$ 277Free CancellationRating
7.4
9,092 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 368Free CancellationRating
7.1
10,534 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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