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Cheap flights from London to Seattle from £262

This is the cheapest one-way flight price, found on 5/12. Prices may vary by date and flight preferences.
LON — SEA
11 Dec — 18 Dec1
1 adult
Mon 11/12
Mon 18/12

The best prices from London to Seattle/Tacoma Intl are usually found in February or March, booked 74 days in advance, depart on a Wednesday or Monday and return on a Thursday

Flights from Seattle to London

How to find the cheapest flight from London (LON) to Seattle (SEA)

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) 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 6 December 2023.

Popular in

July

Cheapest in

February

Round-trip from

£358

One-way from

£262
High demand for flights, 22% potential price rise
Best time to find cheap flights, 16% potential price drop
From London (LON) to Seattle/Tacoma Intl
One-way flight from London (LON) to Seattle/Tacoma Intl

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

Leaving on a Tuesday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 20% on the overall cost on flights from London to Seattle.

How far in advance should I book a flight from London to Seattle?

Travelers have found it’s best to book a flight 49 days in advance to save up to 24% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 49 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from London to Seattle 1-2 weeks in advance for as low as £555, or £682 for flights within the next 24 hours.

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

Due to multiple factors, expect to potentially pay more when booking in July. For low rates, February can be a great choice for travel to Seattle. Flights to Seattle from London in February are about £528 on average during February, but can be found for as low as £343.

When is the cheapest time to fly from London to Seattle (LON - SEA)?

Unlike in the afternoon, when flights are generally more expensive, you can save up to 10% on flights from London to Seattle by exploring options for tickets in the morning.

Cheap JetBlue flights from London to Seattle

Explore cheap flight options specifically provided by JetBlue 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 815,420 searches. Data last updated 6 December 2023.
Check out some of the cheapest JetBlue flights we've come across from London to Seattle. Be sure to come back soon if the deals available don't appeal to you at this time.

Cheap United Airlines flights from London to Seattle

Explore cheap flight options specifically provided by United Airlines 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 815,420 searches. Data last updated 6 December 2023.
Browse through some of the cheapest United Airlines flights travelling from London to Seattle. Ensure the flight price, dates, time, and airline match your criteria before you book.

Cheap London to Seattle flights in December & January 2023

Find cheap flight options from London to Seattle specifically for the months of December and January 2023. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 815,420 searches. Prices were last updated on 6 December 2023.
These are some of the best deals we've found on flights to Seattle in 2023 at this time. More deals are always being added, so be sure to check back regularly.

London to Seattle 2023 flight deals

Discover exclusive flight deals for travel between London and Seattle in 2023. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 815,420 searches. Data last updated 6 December 2023.
These are some of the best deals we've found on flights to Seattle in 2023 at this time. More deals are always being added, so be sure to check back regularly.

Direct flights to Seattle from London

Discover direct flight options from London to Seattle. Find direct flights with no stopovers, providing a convenient travel experience. Explore direct flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 815,420 searches. Data last updated 6 December 2023.
If you're seeking options on non-stop flights from London to Seattle, check out these fares. Those looking to potentially save on 1 or 2-stop flights from London to Seattle should utilise the search form at the top of the page.

London to Seattle flights leaving soon

Find last-minute flight options from London to Seattle for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 815,420 searches. Data last updated 6 December 2023.
Consider one of these great deals we found on last-minute flights from London to Seattle. To prevent any unwanted surprises, users should verify their flight info before booking.

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 815,420 searches. Data last updated 6 December 2023.
Take a look at some of the one-way flights we've detected from London to Seattle. Users can also find round-trip London to Seattle flights by using the search form above.

Find flights from London to Seattle within your budget

Customise 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 815,420 searches. Data last updated 6 December 2023.

Fly from

Any airport

Fly to

Any airport

Budget

£369 - £498

Route

Depart

Return

Price

London GatwickSeattle/Tacoma Intl

LGW - SEA

LGWSEA

London Gatwick

Mon 12/2

1 stop13h 00m

Seattle/Tacoma Intl

Thu 22/2

1 stop12h 20m

£369

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Wed 17/1

Nonstop9h 55m

Seattle/Tacoma Intl

Sat 27/1

2 stops18h 55m

£411

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Mon 12/2

1 stop16h 54m

Seattle/Tacoma Intl

Thu 22/2

Nonstop9h 25m

£441

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Tue 5/3

1 stop20h 51m

Seattle/Tacoma Intl

Tue 19/3

1 stop13h 40m

£446

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Sat 13/1

Nonstop10h 00m

Seattle/Tacoma Intl

Fri 23/2

Nonstop9h 20m

£450

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Fri 15/3

1 stop18h 12m

Seattle/Tacoma Intl

Fri 29/3

1 stop18h 12m

£458

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Wed 17/1

2 stops33h 43m

Seattle/Tacoma Intl

Sat 27/1

1 stop14h 19m

£473

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Fri 3/5

Nonstop10h 20m

Seattle/Tacoma Intl

Thu 9/5

Nonstop9h 35m

£476

London HeathrowSeattle/Tacoma Intl

LHR - SEA

LHRSEA

London Heathrow

Tue 5/3

2 stops19h 47m

Seattle/Tacoma Intl

Tue 19/3

1 stop13h 50m

£498

Flights are sorted by cheapest first

Deals found on 5/12

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 280.19 GBP while a return flight costs 446.70 GBP. Price data was last updated on 3 December 2023.

Currently, March is the cheapest month in which you can book a flight from London to Seattle (average of £571). Flying from London to Seattle in July is currently the most expensive (average of £769). 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

£456

February

£460

March

£453

April

£476

May

£477

June

£549

July

£609

August

£584

September

£544

October

£506

November

£469

December

£473

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 6 December 2023.
Read through reviews of airlines operating flights from London to Seattle, such as JetBlue, United Airlines and Air France. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
7.9
Good
3,035 reviews

Boarding

8.0

Comfort

7.9

Crew

8.5

Food

7.2

Overall

7.9

Entertainment

7.8

Reviews

1 / 10

It was weird that we had to check after security and go to a corral which had no bathroom or other services about an hour before boarding. Had to check out of the corral to leave and check back in.

7.9
Good
3,035 reviews
7.9
Good
3,035 reviews

Boarding

8.0

Comfort

7.9

Crew

8.5

Food

7.2

Overall

7.9

Entertainment

7.8

Reviews

1 / 10

It was weird that we had to check after security and go to a corral which had no bathroom or other services about an hour before boarding. Had to check out of the corral to leave and check back in.

7.6
Good
276 reviews
7.9
Good
3,035 reviews

Boarding

8.0

Comfort

7.9

Crew

8.5

Food

7.2

Overall

7.9

Entertainment

7.8

Reviews

1 / 10

It was weird that we had to check after security and go to a corral which had no bathroom or other services about an hour before boarding. Had to check out of the corral to leave and check back in.

7.5
Good
192 reviews
7.9
Good
3,035 reviews

Boarding

8.0

Comfort

7.9

Crew

8.5

Food

7.2

Overall

7.9

Entertainment

7.8

Reviews

1 / 10

It was weird that we had to check after security and go to a corral which had no bathroom or other services about an hour before boarding. Had to check out of the corral to leave and check back in.

7.5
Good
342 reviews
7.9
Good
3,035 reviews

Boarding

8.0

Comfort

7.9

Crew

8.5

Food

7.2

Overall

7.9

Entertainment

7.8

Reviews

1 / 10

It was weird that we had to check after security and go to a corral which had no bathroom or other services about an hour before boarding. Had to check out of the corral to leave and check back in.

7.4
Good
198 reviews
7.9
Good
3,035 reviews

Boarding

8.0

Comfort

7.9

Crew

8.5

Food

7.2

Overall

7.9

Entertainment

7.8

Reviews

1 / 10

It was weird that we had to check after security and go to a corral which had no bathroom or other services about an hour before boarding. Had to check out of the corral to leave and check back in.

Average temperature in Seattle by month

Plan your trip to Seattle by selecting the month that matches your preferred temperature. December sees the highest average temperature while July sees the lowest average temperature. Temperature data was last updated on 3 December 2023.

SEA

Temperature

5 - 19 °C

Average rainfall in Seattle by month

Keep in mind the precipitation totals in Seattle by selecting the month that matches your preferred temperature. Seattle sees an average of 79.67 precipitation per year with the most occurring in November. Precipitation data was last updated on 3 December 2023.

SEA

Rainfall

18 - 168 mm

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 airport do you fly into for flights to Seattle from London?

Located just 11.4 mi from the city center, Seattle/Tacoma Intl is the airport most travelers will use when flying to Seattle from London. Booking flights from London to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 21 daily inbound flights from London from 14 different airlines.

Can I find flights from London to Seattle for under £400 on Cheapflights?

Yes, there are multiple flights from London to Seattle for under £400. The cheapest flight booked recently is on Icelandair for just £369, but on average you can expect to pay £404.

Are there nonstop flights from London to Seattle for under £500 on Cheapflights?

Cheapflights has at least 20 direct flights from London to Seattle under £500. A good price for a nonstop flight from London to Seattle is less than £470.

Are there last-minute flights available from London to Seattle for under £500?

There are currently 20+ open flights from London to Seattle within the next 7 days for less than £500.

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

Icelandair, at £369, was found to be the cheapest airline from London to Seattle.Alternate airlines flying return to your destination include American Airlines and British Airways. Icelandair is priced at 30% lower than the current average price of a flight leaving 3 months from now.

What are the most popular routes from London to Seattle?

What are the most popular airlines that fly from London to Seattle?

What are the most reliable airlines from London to Seattle?

Consider Alaska Airlines (89%), Air France (77%) or Delta (77%) when booking your flight. These represent the most reliable airlines when flying from London to Seattle.

What are the cheapest flights from London to Seattle?

On average you can expect to pay £1,263 for a flight from London to Seattle. The cheapest flight overall is £359 while the most popular route, (London Heathrow - Seattle/Tacoma Intl) is currently priced at £414.

What does LHR to SEA mean?

London Heathrow Airport is LHR 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. This flight route has multiple associated airports, so we think it might be helpful to learn the name and codes of them as well. They are London Gatwick Airport (LGW), London City Airport (LCY), London Stansted Airport (STN), London Luton Airport (LTN), London Southend Airport (SEN).

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.

Fly from London to Seattle on these airlines
Choose from the following airlines for your flight from London to Seattle. Flights are based on user searches made on Cheapflights and were last updated on 6 December 2023.

Top 10 airlines flying from London to Seattle

Discover the top 10 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 815,420 searches. Data last updated 6 December 2023.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£272Average£531FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
KLMCheapest£354Average£513FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air FranceCheapest£365Average£510FlexibilityNo cancel feeOn-time77%
Search Air France flights
Virgin AtlanticCheapest£366Average£530FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
IcelandairCheapest£389Average£548FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£399Average£555FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£417Average£570FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
FinnairCheapest£422Average£581FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IberiaCheapest£425Average£614FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Air CanadaCheapest£432Average£491FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Search flights to Seattle by cabin class

Hourly flight availability from London to Seattle

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 6 December 2023.
1%of flight departuresEarly morningMidnight to 6 am
45%of flight departuresMorning6 am to noon
54%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Midday
6 PM