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Cheap flights from London, Ontario to Washington from C$ 228

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 21/2. 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.
WestJet Logo
6:15 a.m. - 6:45 p.m.
YXU
-
SEA
15h 30m
1 stop
WestJet Logo
7:35 p.m. - 5:25 a.m.
SEA
-
YXU
6h 50m
1 stop
C$ 348WestJet
Sun, 24 May - Thu, 28 May
Air Canada Logo
9:40 a.m. - 7:16 p.m.
YXU
-
SEA
12h 36m
2 stops
Air Canada Logo
5:40 a.m. - 9:21 p.m.
SEA
-
YXU
12h 41m
2 stops
C$ 541Air Canada
Sun, 8 Mar - Wed, 11 Mar
WestJet Logo
8:10 p.m. - 2:19 p.m.
YXU
-
SEA
21h 09m
1 stop
WestJet Logo
11:55 a.m. - 6:35 a.m.
SEA
-
YXU
39h 40m
2 stops
C$ 561WestJet
Sun, 1 Mar - Sun, 8 Mar
Air Canada Logo
5:40 p.m. - 10:16 p.m.
YXU
-
SEA
7h 36m
1 stop
Air Canada Logo
8:00 p.m. - 8:46 a.m.
SEA
-
YXU
9h 46m
2 stops
C$ 567Air Canada
Sun, 15 Mar - Mon, 16 Mar
Multiple Airlines Logo
8:10 p.m. - 8:57 a.m.
YXU
-
SEA
15h 47m
2 stops
Multiple Airlines Logo
3:10 p.m. - 6:35 a.m.
SEA
-
YXU
12h 25m
1 stop
C$ 571Multiple Airlines
Sun, 1 Mar - Sun, 8 Mar
WestJet Logo
2:35 p.m. - 9:40 a.m.
YXU
-
SEA
22h 05m
2 stops
WestJet Logo
7:35 p.m. - 5:25 a.m.
SEA
-
YXU
6h 50m
1 stop
C$ 578WestJet
Sun, 24 May - Thu, 28 May
Air Canada Logo
5:40 p.m. - 10:16 p.m.
YXU
-
SEA
7h 36m
1 stop
Air Canada Logo
8:00 a.m. - 9:21 p.m.
SEA
-
YXU
10h 21m
1 stop
C$ 591Air Canada
Sun, 8 Mar - Wed, 11 Mar
Air Canada Logo
5:40 p.m. - 10:16 p.m.
YXU
-
SEA
7h 36m
1 stop
Air Canada Logo
8:00 a.m. - 9:21 p.m.
SEA
-
YXU
10h 21m
1 stop
C$ 593Air Canada
Wed, 11 Mar - Sat, 14 Mar
WestJet Logo
2:35 p.m. - 9:40 a.m.
YXU
-
SEA
22h 05m
2 stops
WestJet Logo
10:30 a.m. - 1:45 p.m.
SEA
-
YXU
24h 15m
2 stops
C$ 604WestJet
Sun, 24 May - Thu, 28 May
United Airlines Logo
9:25 a.m. - 12:38 p.m.
YXU
-
PDX
30h 13m
2 stops
United Airlines Logo
3:50 p.m. - 9:21 p.m.
PDX
-
YXU
26h 31m
2 stops
C$ 811United Airlines
Mon, 2 Mar - Wed, 4 Mar

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
8 Mar
YXU5:40 p.m.London
7h 36m
1 stop
SEA10:16 p.m.Seattle/Tacoma Intl
11 Mar
SEA5:40 a.m.Seattle/Tacoma Intl
12h 41m
2 stops
YXU9:21 p.m.London
C$ 541
Air Canada
15 Mar
YXU5:40 p.m.London
7h 36m
1 stop
SEA10:16 p.m.Seattle/Tacoma Intl
16 Mar
SEA8:00 p.m.Seattle/Tacoma Intl
9h 46m
2 stops
YXU8:46 a.m.London
C$ 567
Air Canada
8 Mar
YXU5:40 p.m.London
7h 36m
1 stop
SEA10:16 p.m.Seattle/Tacoma Intl
11 Mar
SEA8:00 a.m.Seattle/Tacoma Intl
10h 21m
1 stop
YXU9:21 p.m.London
C$ 591

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
2 Mar
YXU9:25 a.m.London
30h 13m
2 stops
PDX12:38 p.m.Portland
4 Mar
PDX3:50 p.m.Portland
26h 31m
2 stops
YXU9:21 p.m.London
C$ 811
United Airlines
8 Mar
YXU5:10 a.m.London
18h 48m
3 stops
SEA7:58 p.m.Seattle/Tacoma Intl
11 Mar
SEA8:00 a.m.Seattle/Tacoma Intl
10h 21m
2 stops
YXU9:21 p.m.London
C$ 1,521
United Airlines
8 Mar
YXU5:10 a.m.London
18h 48m
3 stops
SEA7:58 p.m.Seattle/Tacoma Intl
11 Mar
SEA8:00 a.m.Seattle/Tacoma Intl
10h 21m
2 stops
YXU9:21 p.m.London
C$ 1,554

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 February 2026.
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

Sun 24/5

6:15 a.m.-6:45 p.m.

1 stop15h 30m

Seattle/Tacoma Intl

Thu 28/5

7:35 p.m.-5:25 a.m.

1 stop6h 50m

C$ 348

LondonSeattle

YXU - SEA

YXUSEA

London

Sun 8/3

9:40 a.m.-7:16 p.m.

2 stops12h 36m

Seattle/Tacoma Intl

Wed 11/3

5:40 a.m.-9:21 p.m.

2 stops12h 41m

C$ 541

LondonSeattle

YXU - SEA

YXUSEA

London

Sun 1/3

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

1 stop21h 09m

Seattle/Tacoma Intl

Sun 8/3

11:55 a.m.-6:35 a.m.

2 stops39h 40m

C$ 561

LondonSeattle

YXU - SEA

YXUSEA

London

Sun 15/3

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

1 stop7h 36m

Seattle/Tacoma Intl

Mon 16/3

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

2 stops9h 46m

C$ 567

LondonSeattle

YXU - SEA

YXUSEA

London

Sun 1/3

8:10 p.m.-8:57 a.m.

2 stops15h 47m

Seattle/Tacoma Intl

Sun 8/3

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

1 stop12h 25m

C$ 571

LondonSeattle

YXU - SEA

YXUSEA

London

Sun 24/5

2:35 p.m.-9:40 a.m.

2 stops22h 05m

Seattle/Tacoma Intl

Thu 28/5

7:35 p.m.-5:25 a.m.

1 stop6h 50m

C$ 578

LondonSeattle

YXU - SEA

YXUSEA

London

Sun 8/3

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

1 stop7h 36m

Seattle/Tacoma Intl

Wed 11/3

8:00 a.m.-9:21 p.m.

1 stop10h 21m

C$ 591

LondonSeattle

YXU - SEA

YXUSEA

London

Wed 11/3

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

1 stop7h 36m

Seattle/Tacoma Intl

Sat 14/3

8:00 a.m.-9:21 p.m.

1 stop10h 21m

C$ 593

LondonSeattle

YXU - SEA

YXUSEA

London

Sun 24/5

2:35 p.m.-9:40 a.m.

2 stops22h 05m

Seattle/Tacoma Intl

Thu 28/5

10:30 a.m.-1:45 p.m.

2 stops24h 15m

C$ 604

LondonPortland

YXU - PDX

YXUPDX

London

Mon 2/3

9:25 a.m.-12:38 p.m.

2 stops30h 13m

Portland

Wed 4/3

3:50 p.m.-9:21 p.m.

2 stops26h 31m

C$ 811

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 airline that flies from London to Washington?

Air Canada and WestJet 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 37% 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

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$ 239Free CancellationRating
7.2
3,255 reviews
Search WestJet flights
United AirlinesPriceFrom C$ 275Free CancellationRating
7.4
9,236 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 365Free CancellationRating
7.1
10,684 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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