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Cheap flights from London to Seattle from C$ 539

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SEA
26 Nov — 3 Dec1
1 adult

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 21 November 2024.

Round-trip from

C$ 539

Popular in

April

Cheapest in

September

Average price

C$ 751
WestJet
  • WestJet
  • 12/1-11/2
  • 2 total stops
  • 46h 19m total
  • London to Seattle
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High demand for flights, 53% potential price rise
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Best time to find cheap flights, 49% potential price drop
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Average for round-trip flights in November 2024
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Find flight deals from London to Seattle

Cheapest flights from London to Seattle
Explore the most affordable flight options available from London to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 November 2024.

Tue 31/128:00 p.m.YXU - SEA
2 stops15h 05mWestJet
Sun 2/23:15 p.m.SEA - YXU
1 stop24h 58mWestJet
Deal found 19/11C$ 815
Tue 31/123:25 p.m.YXU - SEA
1 stop8h 55mUnited Airlines
Thu 30/19:20 a.m.SEA - YXU
3 stops20h 55mUnited Airlines
Deal found 19/11C$ 826
Mon 30/129:55 a.m.YXU - SEA
1 stop14h 25mAir Canada
Sun 2/27:05 p.m.SEA - YXU
2 stops11h 10mAir Canada
Deal found 19/11C$ 1,247

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 645,034 searches. Data last updated 21 November 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonSeattle

YXU - SEA

YXUSEA

London

Sun 12/1

8:00 p.m.-2:21 p.m.

1 stop21h 21m

Seattle/Tacoma Intl

Tue 11/2

3:15 p.m.-7:13 p.m.

1 stop24h 58m

C$ 539

LondonSeattle

YXU - SEA

YXUSEA

London

Fri 10/1

5:45 a.m.-2:30 p.m.

2 stops11h 45m

Seattle/Tacoma Intl

Thu 30/1

7:05 p.m.-9:15 a.m.

2 stops11h 10m

C$ 569

LondonSeattle

YXU - SEA

YXUSEA

London

Thu 9/1

5:45 a.m.-4:16 p.m.

2 stops13h 31m

Seattle/Tacoma Intl

Mon 20/1

5:00 a.m.-8:20 p.m.

2 stops12h 20m

C$ 577

LondonSeattle

YXU - SEA

YXUSEA

London

Wed 8/1

3:25 p.m.-9:30 p.m.

1 stop9h 05m

Seattle/Tacoma Intl

Wed 22/1

6:05 a.m.-8:20 p.m.

1 stop11h 15m

C$ 618

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/11

Best time to book a flight from London to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from London with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from London to Seattle

Get recent, data-driven insights about flights from London to Seattle including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from London, Ontario to Seattle?

Currently, August is the cheapest month in which you can book a flight from London, Ontario to Seattle (average of C$ 271). Flying from London, Ontario to Seattle in March is currently the most expensive (average of C$ 418). 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.

What is the cheapest time of day to fly from YXU to SEA?

Find hourly flight availability from London to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 November 2024.

One of the essential ways to save on airfare from London, Ontario to Seattle is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 5% on airfare.

Rainfall in Seattle by month

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

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 mm per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

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

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

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 21 November 2024.
United Airlines
7.4
Good
9,172 reviews
Check prices

Entertainment

7.1

Crew

8.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Food

6.7

Reviews

1 / 10

Good boarding process. (Nice to be able to buy Group 2 boarding option.) Plane was clean. Tried to avoid full flight by flying on Saturday, but plane was full anyway. Gate area in Houston should have charging options. Should be a lounge for people with American Express Platinum Card in Houston Airport.

United Airlines
7.4
Good
9,172 reviews
United Airlines
7.4
Good
9,172 reviews
Check prices

Entertainment

7.1

Crew

8.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Food

6.7

Reviews

1 / 10

Good boarding process. (Nice to be able to buy Group 2 boarding option.) Plane was clean. Tried to avoid full flight by flying on Saturday, but plane was full anyway. Gate area in Houston should have charging options. Should be a lounge for people with American Express Platinum Card in Houston Airport.

WestJet
7.3
Good
2,810 reviews
United Airlines
7.4
Good
9,172 reviews
Check prices

Entertainment

7.1

Crew

8.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Food

6.7

Reviews

1 / 10

Good boarding process. (Nice to be able to buy Group 2 boarding option.) Plane was clean. Tried to avoid full flight by flying on Saturday, but plane was full anyway. Gate area in Houston should have charging options. Should be a lounge for people with American Express Platinum Card in Houston Airport.

Air Canada
7.0
Good
8,238 reviews
United Airlines
7.4
Good
9,172 reviews
Check prices

Entertainment

7.1

Crew

8.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Food

6.7

Reviews

1 / 10

Good boarding process. (Nice to be able to buy Group 2 boarding option.) Plane was clean. Tried to avoid full flight by flying on Saturday, but plane was full anyway. Gate area in Houston should have charging options. Should be a lounge for people with American Express Platinum Card in Houston Airport.

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.

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

    According to our current data, WestJet (C$ 539), Air Canada (C$ 569), and United Airlines (C$ 577) offers the cheapest pricing from London, Ontario to Seattle. WestJet is 25% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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.

  • What is the cheapest month to book a flight from London, Ontario to Seattle?

    Currently, August is the cheapest month in which you can book a flight from London, Ontario to Seattle (average of C$ 271). Flying from London, Ontario to Seattle in March is currently the most expensive (average of C$ 418). 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.

See more FAQs

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Alternative routes for London to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from London to Seattle

Discover the top 2 airlines that operate flights from London to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 645,034 searches. Data last updated 21 November 2024.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 302AverageC$ 691FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 365AverageC$ 506FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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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?

Cheapflights helps you find that perfect flight to Seattle from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Certainly. Search results for flights to Seattle from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, Cheapflights offers price alerts on London to Seattle flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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