HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from London (YXU) to Seattle (SEA) from $191

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/24. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
YXU — SEA
May 20 — May 271
From?
To?
Mon 5/20
Mon 5/27
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Cheap flight deals from London to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from London (YXU) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 15, 2024.

Popular in

April

Cheapest in

June

Average price

$482

Round-trip from

$247
High demand for flights, 35% potential price rise
Search Deals
Best time to find cheap flights, 35% potential price drop
Search Deals
Average for round-trip flights in May 2024
Search Deals
From London to Seattle/Tacoma Intl
Search Deals

What is the cheapest day to fly round-trip from London, Ontario to Seattle?

Flights from London, Ontario to Seattle are found to be more expensive on Saturday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Seattle.

What is the cheapest month to fly from London, Ontario to Seattle?

Flights from London, Ontario to Seattle lean towards being more expensive in April. Prices are generally better when you fly from London, Ontario to Seattle in June, with the cheapest ticket starting at $343.

When is the cheapest time to fly from London, Ontario to Seattle (YXU - SEA)?

When flying from London, Ontario to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap WestJet flights from London to Seattle

Explore cheap flight options specifically provided by WestJet for the route between London and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,644,845 searches. Data last updated May 15, 2024.
Find some of the cheapest WestJet flights traveling from London to Seattle. Deals update often to give you more flight options matching your criteria
Tue 7/166:15 amYXU - SEA
1 stop9h 41mWestJet
Tue 7/236:15 pmSEA - YXU
1 stop8h 03mWestJet
Deal found 5/14$330
Fri 9/66:15 amYXU - SEA
1 stop9h 41mWestJet
Tue 9/107:00 amSEA - YXU
1 stop8h 59mWestJet
Deal found 5/13$356
Fri 7/198:00 pmYXU - SEA
1 stop24h 21mWestJet
Sat 7/276:15 pmSEA - YXU
1 stop8h 03mWestJet
Deal found 5/14$357
Fri 9/68:00 pmYXU - SEA
1 stop27h 21mWestJet
Tue 9/107:00 amSEA - YXU
1 stop8h 59mWestJet
Deal found 5/14$434

Cheap Air Canada flights from London to Seattle

Explore cheap flight options specifically provided by Air Canada for the route between London and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,644,845 searches. Data last updated May 15, 2024.
Browse through some of the cheapest Air Canada flights traveling from London to Seattle. Check back soon if you're not seeing flights that suit your needs.
Tue 7/166:00 amYXU - SEA
2 stops11h 34mAir Canada
Tue 7/2311:40 amSEA - YXU
1 stop6h 55mAir Canada
Deal found 5/14$366
Tue 7/166:00 amYXU - SEA
2 stops11h 34mAir Canada
Tue 7/237:05 pmSEA - YXU
2 stops11h 10mAir Canada
Deal found 5/14$371
Fri 9/66:00 amYXU - SEA
2 stops11h 30mAir Canada
Tue 9/107:05 pmSEA - YXU
2 stops11h 12mAir Canada
Deal found 5/13$390

Cheap London to Seattle flights in May & June 2024

Find cheap flight options from London to Seattle specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,644,845 searches. Prices were last updated on May 15, 2024.
The lowest fares we've come across on flights traveling from London to Seattle in May and June 2024. Check back soon for alternative fares.
Sat 5/183:25 pmYXU - SEA
2 stops10h 26mMultiple Airlines
Mon 5/207:40 amSEA - YXU
2 stops22h 36mMultiple Airlines
Deal found 5/14$442
Sat 5/183:25 pmYXU - SEA
1 stop9h 33mAir Canada
Mon 5/207:05 pmSEA - YXU
2 stops11h 11mAir Canada
Deal found 5/14$732
Sat 5/189:50 amYXU - SEA
2 stops16h 01mUnited Airlines
Mon 5/207:15 amSEA - YXU
3 stops28h 31mUnited Airlines
Deal found 5/14$1,036

London to Seattle 2024 flight deals

Discover exclusive flight deals for travel between London and Seattle in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,644,845 searches. Data last updated May 15, 2024.
The lowest fares we've come across on flights traveling from London to Seattle in May and June 2024. Check back soon for alternative fares.
Tue 7/166:15 amYXU - SEA
1 stop9h 41mWestJet
Tue 7/236:15 pmSEA - YXU
1 stop8h 03mWestJet
Deal found 5/14$330
Fri 9/66:15 amYXU - SEA
1 stop9h 41mWestJet
Tue 9/107:00 amSEA - YXU
1 stop8h 59mWestJet
Deal found 5/13$356
Fri 7/198:00 pmYXU - SEA
1 stop24h 21mWestJet
Sat 7/276:15 pmSEA - YXU
1 stop8h 03mWestJet
Deal found 5/14$357
Tue 7/166:00 amYXU - SEA
2 stops11h 34mAir Canada
Tue 7/2311:40 amSEA - YXU
1 stop6h 55mAir Canada
Deal found 5/14$366
Tue 7/166:00 amYXU - SEA
2 stops11h 34mAir Canada
Tue 7/237:05 pmSEA - YXU
2 stops11h 10mAir Canada
Deal found 5/14$371
Fri 9/69:50 amYXU - SEA
2 stops12h 02mUnited Airlines
Tue 9/1010:50 pmSEA - YXU
2 stops12h 57mUnited Airlines
Deal found 5/14$373
Fri 9/66:00 amYXU - SEA
2 stops11h 30mAir Canada
Tue 9/107:05 pmSEA - YXU
2 stops11h 12mAir Canada
Deal found 5/13$390
Tue 7/166:15 amYXU - SEA
1 stop9h 41mWestJet
Tue 7/236:15 pmSEA - YXU
1 stop8h 03mWestJet
Deal found 5/15$394
Tue 7/166:15 amYXU - SEA
1 stop9h 41mWestJet
Tue 7/236:15 pmSEA - YXU
1 stop8h 03mWestJet
Deal found 5/15$395

One-way flights to Seattle from London

Search for one-way flight options from London to Seattle. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,644,845 searches. Data last updated May 15, 2024.
Take a look at some of the one-way flights we've detected from London to Seattle. Users needing a return flight from London to Seattle should utilize the search form above.
Mon 6/246:15 amYXU - SEA
1 stop9h 41mWestJet
Deal found 5/14$191
Sat 6/226:15 amYXU - SEA
1 stop9h 41mWestJet
Deal found 5/14$212
Thu 7/116:15 amYXU - SEA
1 stop14h 06mWestJet
Deal found 5/14$241
Mon 6/246:15 amYXU - SEA
3 stops29h 44mMultiple Airlines
Deal found 5/14$249
Tue 7/28:00 pmYXU - SEA
2 stops27h 09mMultiple Airlines
Deal found 5/14$258
Wed 7/36:15 amYXU - SEA
3 stops29h 17mMultiple Airlines
Deal found 5/14$267
Sun 6/233:20 pmYXU - SEA
1 stop9h 38mAir Canada
Deal found 5/14$276
Sat 6/298:00 pmYXU - SEA
2 stops39h 32mMultiple Airlines
Deal found 5/14$279
Sat 6/229:50 amYXU - SEA
2 stops14h 35mAir Canada
Deal found 5/14$281

Find flights from London to Seattle within your budget

Customize your flight search to find flights from London to Seattle 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, Cheapflights users made 2,644,845 searches. Data last updated May 15, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$330 - $434

Route

Depart

Return

Price

LondonSeattle/Tacoma Intl

YXU - SEA

YXUSEA

London

Tue 7/16

1 stop9h 41m

Seattle/Tacoma Intl

Tue 7/23

1 stop8h 03m

$330

LondonSeattle/Tacoma Intl

YXU - SEA

YXUSEA

London

Fri 9/6

1 stop9h 41m

Seattle/Tacoma Intl

Tue 9/10

1 stop8h 59m

$356

LondonSeattle/Tacoma Intl

YXU - SEA

YXUSEA

London

Fri 7/19

1 stop24h 21m

Seattle/Tacoma Intl

Sat 7/27

1 stop8h 03m

$357

LondonSeattle/Tacoma Intl

YXU - SEA

YXUSEA

London

Tue 7/16

2 stops11h 34m

Seattle/Tacoma Intl

Tue 7/23

1 stop6h 55m

$366

LondonSeattle/Tacoma Intl

YXU - SEA

YXUSEA

London

Tue 7/16

2 stops11h 34m

Seattle/Tacoma Intl

Tue 7/23

2 stops11h 10m

$371

LondonSeattle/Tacoma Intl

YXU - SEA

YXUSEA

London

Fri 9/6

2 stops12h 02m

Seattle/Tacoma Intl

Tue 9/10

2 stops12h 57m

$373

LondonSeattle/Tacoma Intl

YXU - SEA

YXUSEA

London

Fri 9/6

2 stops11h 30m

Seattle/Tacoma Intl

Tue 9/10

2 stops11h 12m

$390

LondonSeattle/Tacoma Intl

YXU - SEA

YXUSEA

London

Fri 9/6

1 stop27h 21m

Seattle/Tacoma Intl

Tue 9/10

1 stop8h 59m

$434

Flights are sorted by cheapest first

Deals found on 5/14

When is the cheapest time to fly from London, Ontario to Seattle?

Use this chart to determine the cheapest time to fly round-trip from London to Seattle. Price data was last updated on May 12, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their London, Ontario to Seattle flight should consider departing on Sunday mornings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to Seattle by month

Plan your trip from London to Seattle by taking into account the cheapest months to travel. The average price of a one-way flight from London to Seattle is currently $250 while a round-trip flight costs $372. Price data was last updated on May 12, 2024.

Currently, January is the cheapest month in which you can book a flight from London, Ontario to Seattle (average of $247). Flying from London, Ontario to Seattle in July is currently the most expensive (average of $407). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

January

$247

February

$254

March

$288

April

$294

May

$318

June

$404

July

$407

August

$344

September

$278

October

$256

November

$258

December

$248

Temperature and rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average temperature and rainfall totals by month.

SEA

Temperature

41 - 66.2 °F

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated May 15, 2024.
See what other customers who have flown with WestJet and Air Canada from London to Seattle have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,691 reviews
Check prices

Comfort

7.9

Boarding

8.2

Entertainment

8.0

Food

7.4

Overall

8.0

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Delta
8.0
Very good
10,691 reviews
Delta
8.0
Very good
10,691 reviews
Check prices

Comfort

7.9

Boarding

8.2

Entertainment

8.0

Food

7.4

Overall

8.0

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

WestJet
7.5
Good
2,920 reviews
Delta
8.0
Very good
10,691 reviews
Check prices

Comfort

7.9

Boarding

8.2

Entertainment

8.0

Food

7.4

Overall

8.0

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

United Airlines
7.4
Good
10,946 reviews
Delta
8.0
Very good
10,691 reviews
Check prices

Comfort

7.9

Boarding

8.2

Entertainment

8.0

Food

7.4

Overall

8.0

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Air Canada
7.0
Good
6,944 reviews
Delta
8.0
Very good
10,691 reviews
Check prices

Comfort

7.9

Boarding

8.2

Entertainment

8.0

Food

7.4

Overall

8.0

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Related info for your journey

Find useful and relevant information for your journey from London to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find flights from London, Ontario to Seattle for under $400 on Cheapflights?

    Yes, there are multiple flights from London, Ontario to Seattle for under $400. The cheapest flight booked recently is on WestJet for just $330, but on average you can expect to pay $372.

  • What are the cheapest airlines flying from London, Ontario to Seattle round-trip?

    Currently priced at $330, WestJet will fly you from London, Ontario to Seattle and back. In addition to WestJet, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Air Canada and United Airlines - these airlines can fly you to your destination from $366 and $373, respectively. WestJet is 39% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from London, Ontario to Seattle one-way?

    One-way options have recently been found by users for as low as $191 on WestJet. Other airlines that offer cheap prices include Air Canada from $276 and Delta from $285 one-way.

  • What does YXU to SEA mean?

    London Airport is YXU and Seattle/Tacoma Intl Airport is SEA. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service.

  • Can I find deals for flights from London to Seattle that include extra baggage allowance?

    The amount of baggage you can bring on your London to Seattle flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from London to Seattle with specific airlines?

    Yes, Cheapflights allows you to browse and filter London to Seattle flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from London to Seattle that include hotel bookings?

    Yes. In addition to deals on London to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from London to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Seattle.

  • Can I find deals for business class flights from London to Seattle?

    Yes. Cheapflights offers flight deals from London to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from London to Seattle that allow pets onboard?

    Many airlines flying from London to Seattle offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from London to Seattle?

    Yes, you can often find last-minute deals on London to Seattle flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the London, Ontario to Seattle flight deals updated?

    The London, Ontario to Seattle flight deals you see on this page were last updated on 5/15.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London to Seattle
See prices for flight routes from nearby airports that may be better suited for you.

Pearson Intl to Seattle flights
Pierre Elliott Trudeau Intl to Seattle flights
Pearson Intl to Portland flights
Kitchener-Waterloo to Seattle flights
Pierre Elliott Trudeau Intl to Portland flights
Ottawa to Seattle flights
Pearson Intl to Spokane flights
Hamilton to Portland flights
Toronto Island to Portland flights
Pierre Elliott Trudeau Intl to Spokane flights
Pierre Elliott Trudeau Intl to Pasco flights
Ottawa to Portland flights
London to Portland flights
Windsor to Portland flights
Kingston to Seattle flights
Charlotte to Orlando flights
USA to Ireland flights
Portland to Los Angeles flights
Boston to Baltimore flights
New Orleans to New York flights
Atlanta to Los Angeles flights
Chicago to Dallas flights
New York to Rome flights
Miami to Cuba flights
Atlanta to Nashville flights
Sacramento to Seattle flights
London, Ontario to Orlando Sanford Intl Airport flights

Search flights from London to Seattle by cabin class

Find flights from London to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Montes Claros
Flights to Girona Costa Brava
Flights to Naxos
Flights to Bourgas
Flights to Hyannis Barnstable
Flights to Samos
Flights to Reggio Calabria Tito Menniti
Flights to Devils Lake
Flights to Ningbo Lishe Intl
Flights to Pellston Emmet County
Flights to Provincetown
Flights to Cortez Montezuma County
Flights to Ohrid
Flights to Oran Es Senia
Flights to Menorca/Mahon
Flights to Hakodate
Flights to Ordu/Giresun
Flights to Laayoune Hassan I
Flights to Cornwall Newquay
Flights to Melilla
Flights to Rennes St Jacques
Flights to Parikia Paros
Flights to Constanţa Mihail Kogalniceanu
Flights to Miyakojima Hirara

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from London to Seattle?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Seattle from London today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from London to Seattle?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Seattle from London.

Can Cheapflights find flights from London to Seattle with no change fees?

Need flexible booking options for your flight to Seattle from London? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from London to Seattle become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines