Find Cheap Flights from London to Seattle (LON - SEA)

Flights overview

Useful information for finding cheap flights from London to Seattle and booking your next trip

Cheapest round-trip flights	$450	Icelandair 1 stop 29 hr Thu, Mar 12 — Wed, Mar 25	The cheapest round-trip flight from London to Seattle is currently $450
Cheapest one-way flight	$377	Icelandair 1 stop 38 hr Sun, Mar 15	The cheapest one-way flight from London to Seattle is currently $377
Cheapest nonstop flights	$553	Delta Nonstop 11 hr Mon, Apr 13 — Mon, Apr 27	The cheapest nonstop round-trip flight from London to Seattle is currently $553
Last-minute weekend getaway	$514	Lufthansa, Lufthansa City Airlines 1 stop 14 hr Fri, Jan 30 — Sun, Feb 1	The cheapest last-minute weekend getaway from London to Seattle is currently $514
Cheapest business class flights	$2,929	Air France, Delta 2 stops 20 hr Fri, Apr 10 — Sat, Apr 25	The cheapest business class round-trip flight from London to Seattle is currently $2,929

Fastest flight	9 hr 45 min	The fastest nonstop flight from London to Seattle takes 9 hr 45 min
Nonstop flights	Every day	There are direct flights on this route every day.

When is the cheapest time to fly?

The cheapest month to fly from London to Seattle is typically February. The most expensive month to fly is typically July.

February Cheapest	Typical prices: $465–710
July Most expensive	Typical prices: $700–970

Popular airlines from London to Seattle

British Airways

Nonstop

from $535

Typical price: $690–1,300

10 weekly nonstop flights

LHR - SEA Every day
Delta

Nonstop

from $520

Typical price: $670–1,150

7 weekly nonstop flights

LHR - SEA Every day

24 weekly connecting flights

LHR - SEA Every day
Virgin Atlantic

Nonstop

from $537

Typical price: $680–1,200

4 weekly nonstop flights

LHR - SEA Every Mon, Tue, Thu, Sat
United

from $499

Typical price: $620–1,250

47 weekly connecting flights

LHR - SEA Every day
Turkish Airlines

from $927

Typical price: $950–1,950

40 weekly connecting flights

LGW, LHR - SEA Every day
Icelandair

from $450

Typical price: $590–1,450

35 weekly connecting flights

LGW, LHR - SEA Every day

Popular airports near London

Heathrow Airport (LHR)

London United Kingdom 48 min 14 mi
London Gatwick Airport (LGW)

London United Kingdom 1 hr 26 min 25 mi
London Stansted Airport (STN)

London United Kingdom 1 hr 5 min 30 mi
London Luton Airport (LTN)

London United Kingdom 1 hr 9 min 27 mi

Popular airports near Seattle

Seattle-Tacoma International Airport (SEA)

Seattle United States 18 min 11 mi
Paine Field (PAE)

Everett United States 31 min 21 mi
King County International Airport - Boeing Field (BFI)

Seattle United States 11 min 5 mi
Portland International Airport (PDX)

Portland United States 2 hr 44 min 140 mi

Frequently asked questions about flying from London to Seattle

The cheapest flights from London to Seattle are usually in February. Typical ticket prices in February range from $465 to $710.

The cheapest round-trip flight from London to Seattle recently found on Google Flights was with Icelandair from $450. The cheapest one-way flight was with Icelandair from $377.

Some of the cheapest round-trip deals we found with different airlines:

The cheapest British Airways flight from London to Seattle is $535, flying from Apr 20 to May 4.
The cheapest Delta flight from London to Seattle is $520, flying from Mar 2 to Mar 16.
The cheapest Virgin Atlantic flight from London to Seattle is $537, flying from Feb 16 to Mar 2.
The cheapest United flight from London to Seattle is $499, flying from Mar 6 to Mar 19.
The cheapest Turkish Airlines flight from London to Seattle is $927, flying from Mar 12 to Mar 25.
The cheapest Icelandair flight from London to Seattle is $450, flying from Mar 12 to Mar 25.

The cheapest round-trip flight from London to Seattle starts at $450 from Thu, Mar 12 to Wed, Mar 25. The cheapest one-way flight starts at $377 and departs on Sun, Mar 15.

9 hr 45 min is the shortest flight time from London to Seattle.

Most visitors come May–Sep, a period encompassing events such as the Seattle International Film Festival (May); Seafair (Jul), a summer festival including boat races, marathons and parades; and Bumbershoot (Sep), an international music and arts festival. Rainy season is Nov–May, though rain is possible year-round.

It's easy to use Google Flights to find the cheapest days to fly from London to Seattle.
Just click the Departure label near the top of the page to open the calendar. Choose a start date and a return date to see how the round-trip fare changes on those specific days.
Adjust the trip type to see one-way fares. The cheapest available flights are highlighted and easy to spot. Once you settle on dates, click the Search button to see flight options and book the deal.

You can also turn on price tracking to get alerts if the price changes for a route or flight.

What counts as the best airline for your flights from London to Seattle really depends on your individual needs. You may have a favorite carrier or a loyalty program you like, but price, convenience, and airports served also come into play. Flexibility and booking terms – Can you change flights if you want to stay longer or get a refund if you have to postpone your trip? – are also factors that help determine which airline is best to fly from London to Seattle.

In terms of nonstop flights, British Airways is the most popular. British Airways offers 10 nonstop flights per week. British Airways flies from Heathrow Airport (LHR) to Seattle-Tacoma International Airport (SEA) .

In terms of flights, United is the most popular. United offers 47 connecting flights per week. United flies from Heathrow Airport (LHR) to Seattle-Tacoma International Airport (SEA) .

Other popular airlines flying from London to Seattle are:

Delta offers 7 nonstop flights and 24 connecting flights per week. Delta flies from Heathrow Airport (LHR) to Seattle-Tacoma International Airport (SEA) .
Virgin Atlantic offers 4 nonstop flights per week. Virgin Atlantic flies from Heathrow Airport (LHR) to Seattle-Tacoma International Airport (SEA) .
Turkish Airlines offers 40 connecting flights per week. Turkish Airlines flies from London Gatwick Airport (LGW) , Heathrow Airport (LHR) to Seattle-Tacoma International Airport (SEA) .
Icelandair offers 35 connecting flights per week. Icelandair flies from London Gatwick Airport (LGW) , Heathrow Airport (LHR) to Seattle-Tacoma International Airport (SEA) .

The number of connecting flights refers to distinct flights with at least one stop between London and Seattle.

The cheapest round-trip flight from London to Seattle recently found on Google Flights was with Icelandair from $450. The cheapest one-way flight was with Icelandair from $377.

Some of the cheapest round-trip deals we found with different airlines:

The cheapest British Airways flight from London to Seattle is $535, flying from Apr 20 to May 4.
The cheapest Delta flight from London to Seattle is $520, flying from Mar 2 to Mar 16.
The cheapest Virgin Atlantic flight from London to Seattle is $537, flying from Feb 16 to Mar 2.
The cheapest United flight from London to Seattle is $499, flying from Mar 6 to Mar 19.
The cheapest Turkish Airlines flight from London to Seattle is $927, flying from Mar 12 to Mar 25.
The cheapest Icelandair flight from London to Seattle is $450, flying from Mar 12 to Mar 25.

British Airways, Delta and Virgin Atlantic fly direct from London to Seattle.

There are 10 British Airways direct flights from London to Seattle per week. Flights are available every day.
There are 7 Delta direct flights from London to Seattle per week. Flights are available every day.
There are 4 Virgin Atlantic direct flights from London to Seattle per week. Flights are available on Monday, Tuesday, Thursday and Saturday.

Use the Stops filter while searching for flights, to see only nonstop options in your results.

The cheapest last-minute deal between London and Seattle at price $514 is offered by Lufthansa, Lufthansa City Airlines from Fri, Jan 30 to Sun, Feb 1.

British Airways, Delta and Virgin Atlantic fly direct from London to Seattle.

There are 10 British Airways direct flights from London to Seattle per week. Flights are available every day.
There are 7 Delta direct flights from London to Seattle per week. Flights are available every day.
There are 4 Virgin Atlantic direct flights from London to Seattle per week. Flights are available on Monday, Tuesday, Thursday and Saturday.

Use the Stops filter while searching for flights, to see only nonstop options in your results.

There are direct flights from London to Seattle on a daily basis.

The cheapest direct (nonstop) round-trip flights between London and Seattle start at $553 from Mon, Apr 13 to Mon, Apr 27 with Delta.

It's easy to find nonstop flights with Google Flights! Once you've searched for flights from London to Seattle, just select the nonstop flights only option in the 'Stops’ filter in the search form and view all available direct flights and their prices.

The cheapest business class round-trip flights between London and Seattle start at $2,929 from Fri, Apr 10 to Sat, Apr 25 with Air France, Delta.

The cheapest economy class round-trip flights between London and Seattle start at $450 from Thu, Mar 12 to Wed, Mar 25.

To book business class trips from London to Seattle, look for the default Economy selection at the top, and change it to your desired cabin class such as Premium Economy, Business Class, or First Class. You can then select your departure and arrival dates, consider available options, and book your business travel.

You can also adjust the trip type to view one-way fares.

The best last-minute getaway deal for the next weekend between London and Seattle starts at $514 from Fri, Jan 30 to Sun, Feb 1 with Lufthansa, Lufthansa City Airlines.

The cheapest last-minute deal between London and Seattle at price $514 is offered by Lufthansa, Lufthansa City Airlines from Fri, Jan 30 to Sun, Feb 1.

To find last-minute flight deals from London to Seattle, start by entering the city names, select the desired departure and return dates, and hit the Search button to view flight options.

You can check for last-minute flights for the same day or adjust the trip type to see one-way fares.