Cheap Flights from London to Seattle

Cheapest flights from London to Seattle

Flaut.Travel was designed and developed by a team dedicated to making the process of searching, comparing and booking airline tickets as easy and convenient as possible. Our service helps travelers to find and buy the cheapest flights from London to Seattle. We have connected more than 40 airlines and airline ticketing agencies to help you find the most suitable and affordable flight option.

Cheapest one way flight

$451

Icelandair

1 layover

12h 45m

02/01/2027

The cheapest one-way flight from London to Seattle departs on 02/01/2027, is operated by Icelandair and costs $451

Cheapest round trip flight

$540

Lufthansa

1 layover

1d 2h 5m

11/16/2026

The cheapest roundtrip flight from London to Seattle departs on 11/16/2026, is operated by Lufthansa and costs $540

The fastest flight

10h 10m

Fastest flight from London to Seattle takes 10h 10m

Remember that on average the ideal time to book flights is 2 months before departure!

Airfare from London to Seattle by month

In different months, ticket prices from London to Seattle vary: minimum — $519 (January 2027), maximum — $593 (August 2027). Typically, the flight costs $554–$580.

January 2027

Lowest price

on average:

$519

August 2027

Highest price

on average:

$593

Avg Price

Price dynamics

Flight prices from London to Seattle barely change from month to month. You can comfortably choose any convenient dates — there won't be a significant overpayment.

Cheaper and more expensive periods

There is a slight difference: it's a bit cheaper in November 2026–January 2027 (averaging $522) and slightly more in January 2027–August 2027 ($556). But overall, the difference is small.

Best time to buy

On this route, you don't need to target specific months — prices are stable. The difference between the cheapest and most expensive period is only 6%. Book whenever it's convenient.

Price predictability

Monthly price variation is just 5.8%. Ticket costs on this route are among the most predictable.

Airlines operating on route

The route London — Seattle is served by many carriers — 12 in total, including American Airlines, KLM, Virgin Atlantic, Alaska Airlines, British Airways, Icelandair, Ryanair, Lufthansa, Aer Lingus, Air Canada, United Airlines, and Brussels Airlines. This gives passengers wide opportunities: from finding the lowest fare (from $451) to selecting flights by schedule or service class. Our service aggregates data from multiple booking systems so you can compare offers in one place. This saves time and money: no need to check dozens of sites — just pick the right option and book online.

starting at $678

starting at $1,370

starting at $854

starting at $555

starting at $667

starting at $451

starting at $540

starting at $561

starting at $594

starting at $598

starting at $603

starting at $657

Non-stop flights from London to Seattle

A non-stop flight is the most convenient and comfortable way to fly from London to Seattle, despite the fact that sometimes flights with transfers can cost significantly less.

London — Seattle

LON — SEA

02/01/2027

Departure

Direct flight

AA6908

starting at $678

London — Seattle

LON — SEA

11/02/2026

Departure

Direct flight

KL6022

starting at $1,370

London — Seattle

LON — SEA

12/21/2026

Departure

Direct flight

AA6908

starting at $1,848

London — Seattle

LON — SEA

08/04/2027

Departure

Direct flight

VS105

starting at $854

London — Seattle

LON — SEA

12/13/2026

Departure

Direct flight

AS101

starting at $555

London — Seattle

LON — SEA

10/27/2026

Departure

Direct flight

AS101

starting at $660

London — Seattle

LON — SEA

10/28/2026

Departure

Direct flight

AS101

starting at $660

London — Seattle

LON — SEA

10/29/2026

Departure

Direct flight

AS101

starting at $660

London — Seattle

LON — SEA

10/31/2026

Departure

Direct flight

AS101

starting at $661

London — Seattle

LON — SEA

12/12/2026

Departure

Direct flight

BA6910

starting at $667

Schedule of direct flights from London to Seattle

There are most likely no direct flights on the London — Seattle route

London airports overview

London City Airport

•

LCY

2km

London Gatwick Airport

•

LGW

43km

London Heathrow Airport

•

LHR

36km

Major international hub serving London with extensive long‑haul and short‑haul connections, multiple terminals, and frequent rail and bus links to the city center.

London Luton Airport

•

LTN

51km

London Southend Airport

•

SEN

45km

Serves the eastern Greater London area and Southend-on-Sea, offering domestic and limited international routes with a compact terminal and a dedicated rail link for convenient access to central London.

Stansted Airport

•

STN

45km

Serving London and the East of England about 50 km northeast of central London, it handles primarily low-cost and international flights. Frequent rail and coach links provide direct connections to central London and regional destinations.

•

Seattle airports overview

Boeing Field International Airport

•

BFI

8km

Seattle-Tacoma International Airport

•

SEA

19km

Primary air hub for the Seattle metropolitan area and Puget Sound, offering extensive domestic and international routes, multiple terminals, light rail and shuttle connections, and convenient access to downtown Seattle.

•

Frequently asked questions (FAQ)

Answers to questions about the route that travelers are most interested in.

What is the cheapest price for flights from London to Seattle?

The cheapest flight ticket from London to Seattle according to data for the last 48 hours costs $451

When is the best time to buy air tickets on the route London — Seattle?

Often the best time to buy tickets from London to Seattle is 2 months before departure.

When is the cheapest time of year to fly from London to Seattle?

Based on statistics over the past years, the lowest prices for flights from London to Seattle can be found flying in these months: January, November, October.

How long does it take to fly from London to Seattle?

The fastest flights from London to Seattle start from 10 hours 10 minutes in the air.

Which airline can fly direct from London to Seattle?

The following airlines operate direct flights on the route London — Seattle: American Airlines, KLM, Virgin Atlantic

Special offers and sales on air tickets from London to Seattle

We keep tight track on airlines' pre-holidays sales and other special offers occurences all the time to let you save maximum amount of funds while traveling to your family or just going out on vacation.

We couldn't find any special offers for flights from London to Seattle

Alternative routes

•••••••••••••••••••

Price dynamics

Flight prices from London to Seattle barely change from month to month. You can comfortably choose any convenient dates — there won't be a significant overpayment.

Cheaper and more expensive periods

There is a slight difference: it's a bit cheaper in November 2026–January 2027 (averaging $522) and slightly more in January 2027–August 2027 ($556). But overall, the difference is small.

Best time to buy

On this route, you don't need to target specific months — prices are stable. The difference between the cheapest and most expensive period is only 6%. Book whenever it's convenient.

Price predictability

Monthly price variation is just 5.8%. Ticket costs on this route are among the most predictable.

London — Seattle

LON — SEA

02/01/2027

Departure

Direct flight

AA6908

starting at $678

London — Seattle

LON — SEA

11/02/2026

Departure

Direct flight

KL6022

starting at $1,370

London — Seattle

LON — SEA

12/21/2026

Departure

Direct flight

AA6908

starting at $1,848

London — Seattle

LON — SEA

08/04/2027

Departure

Direct flight

VS105

starting at $854

London — Seattle

LON — SEA

12/13/2026

Departure

Direct flight

AS101

starting at $555

London — Seattle

LON — SEA

10/27/2026

Departure

Direct flight

AS101

starting at $660

London — Seattle

LON — SEA

10/28/2026

Departure

Direct flight

AS101

starting at $660

London — Seattle

LON — SEA

10/29/2026

Departure

Direct flight

AS101

starting at $660

London — Seattle

LON — SEA

10/31/2026

Departure

Direct flight

AS101

starting at $661

London — Seattle

LON — SEA

12/12/2026

Departure

Direct flight

BA6910

starting at $667

What is the cheapest price for flights from London to Seattle?

The cheapest flight ticket from London to Seattle according to data for the last 48 hours costs $451

When is the best time to buy air tickets on the route London — Seattle?

Often the best time to buy tickets from London to Seattle is 2 months before departure.

When is the cheapest time of year to fly from London to Seattle?

Based on statistics over the past years, the lowest prices for flights from London to Seattle can be found flying in these months: January, November, October.

How long does it take to fly from London to Seattle?

The fastest flights from London to Seattle start from 10 hours 10 minutes in the air.

Which airline can fly direct from London to Seattle?

The following airlines operate direct flights on the route London — Seattle: American Airlines, KLM, Virgin Atlantic

starting at $678

starting at $1,370

starting at $854

starting at $555

starting at $667

starting at $451

starting at $540

starting at $561

starting at $594

starting at $598

starting at $603

starting at $657

Cheap Flights from London to Seattle

Compare airlines, prices, and flight durations for your trip

Cheapest flights from London to Seattle

Cheapest one way flight

$451

Icelandair

1 layover

12h 45m

02/01/2027

Cheapest round trip flight

$540

Lufthansa

1 layover

1d 2h 5m

11/16/2026

The fastest flight

10h 10m

Airfare from London to Seattle by month

January 2027

on average:

$519

August 2027

on average:

$593

Price dynamics

Cheaper and more expensive periods

Best time to buy

Price predictability

Airlines operating on route

Non-stop flights from London to Seattle

Schedule of direct flights from London to Seattle

London airports overview

London City Airport

London Gatwick Airport

London Heathrow Airport

London Luton Airport

London Southend Airport

Stansted Airport

Seattle airports overview

Boeing Field International Airport

Seattle-Tacoma International Airport

Frequently asked questions (FAQ)

Special offers and sales on air tickets from London to Seattle

Alternative routes

January 2027

on average:

$519

August 2027

on average:

$593

Price dynamics

Cheaper and more expensive periods

Best time to buy

Price predictability

Cheapest one way flight

$451

Icelandair

1 layover

12h 45m

02/01/2027

Cheapest round trip flight

$540

Lufthansa

1 layover

1d 2h 5m

11/16/2026

The fastest flight

10h 10m

Direct flights

Every day

Earliest flight

9:50 AM

Latest flight

6:30 PM

Direct flights count

51

Distance

7699km

Timezone difference

8h