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

Flights overview

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

Cheapest round-trip flights	$511	Icelandair 1 stop 12 hr Thu, Apr 16 — Wed, Apr 29	The cheapest round-trip flight from Seattle to London is currently $511
Cheapest one-way flight	$375	British Airways Nonstop 10 hr Wed, Feb 25	The cheapest one-way flight from Seattle to London is currently $375
Cheapest nonstop flights	$593	British Airways Nonstop 10 hr Sun, Feb 22 — Tue, Mar 10	The cheapest nonstop round-trip flight from Seattle to London is currently $593
Last-minute weekend getaway	$774	Icelandair 1 stop 21 hr Fri, Jan 23 — Mon, Jan 26	The cheapest last-minute weekend getaway from Seattle to London is currently $774
Cheapest business class flights	$1,881	Icelandair 1 stop 12 hr Sun, Apr 19 — Tue, May 5	The cheapest business class round-trip flight from Seattle to London is currently $1,881

Fastest flight	9 hr 15 min	The fastest nonstop flight from Seattle to London takes 9 hr 15 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 Seattle to London is typically January. The most expensive month to fly is typically June.

January Cheapest	Typical prices: $510–770
June Most expensive	Typical prices: $770–1,150

Popular airlines from Seattle to London

British Airways

Nonstop

from $563

Typical price: $630–1,550

10 weekly nonstop flights

SEA - LHR Every day
Delta

Nonstop

from $616

Typical price: $610–1,250

7 weekly nonstop flights

SEA - LHR Every day

18 weekly connecting flights

SEA - LHR Every day
Virgin Atlantic

Nonstop

from $616

Typical price: $610–1,450

3 weekly nonstop flights

SEA - LHR Every Mon, Tue, Sat
United

from $581

Typical price: $620–1,850

42 weekly connecting flights

SEA - LHR Every day
Turkish Airlines

from $743

Typical price: $790–1,800

41 weekly connecting flights

SEA - LGW, LHR Every day
Icelandair

from $511

Typical price: $530–1,600

27 weekly connecting flights

SEA - LGW, LHR Every day

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

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

Frequently asked questions about flying from Seattle to London

The cheapest flights from Seattle to London are usually in January. Typical ticket prices in January range from $510 to $770.

The cheapest round-trip flight from Seattle to London recently found on Google Flights was with Icelandair from $511. The cheapest one-way flight was with British Airways from $375.

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

The cheapest British Airways flight from Seattle to London is $563, flying from Feb 23 to Mar 11.
The cheapest Delta flight from Seattle to London is $616, flying from Feb 19 to Mar 4.
The cheapest Virgin Atlantic flight from Seattle to London is $616, flying from Feb 26 to Mar 12.
The cheapest United flight from Seattle to London is $581, flying from Feb 28 to Mar 13.
The cheapest Turkish Airlines flight from Seattle to London is $743, flying from Mar 5 to Mar 18.
The cheapest Icelandair flight from Seattle to London is $511, flying from Apr 16 to Apr 29.

The cheapest round-trip flight from Seattle to London starts at $511 from Thu, Apr 16 to Wed, Apr 29. The cheapest one-way flight starts at $375 and departs on Wed, Feb 25.

9 hr 15 min is the shortest flight time from Seattle to London.

London is a year-round destination, getting busiest Jun–Sep and in the run-up to Christmas and New Year (Dec). Jul–Aug is when many Europeans take holidays, so visitors may face more crowds and limited availability of hotel rooms. Key events include the London Marathon (Apr), Notting Hill Carnival (Aug) and Frieze London art fair (Oct). Sep–May is the city's primary season for theatre, opera, ballet and classical music. Summer’s warmer weather brings many free outdoor music and theatre festivals.

It's easy to use Google Flights to find the cheapest days to fly from Seattle to London.
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 Seattle to London 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 Seattle to London.

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

In terms of flights, United is the most popular. United offers 42 connecting flights per week. United flies from Seattle-Tacoma International Airport (SEA) to Heathrow Airport (LHR) .

Other popular airlines flying from Seattle to London are:

Delta offers 7 nonstop flights and 18 connecting flights per week. Delta flies from Seattle-Tacoma International Airport (SEA) to Heathrow Airport (LHR) .
Virgin Atlantic offers 3 nonstop flights per week. Virgin Atlantic flies from Seattle-Tacoma International Airport (SEA) to Heathrow Airport (LHR) .
Turkish Airlines offers 41 connecting flights per week. Turkish Airlines flies from Seattle-Tacoma International Airport (SEA) to London Gatwick Airport (LGW) , Heathrow Airport (LHR) .
Icelandair offers 27 connecting flights per week. Icelandair flies from Seattle-Tacoma International Airport (SEA) to London Gatwick Airport (LGW) , Heathrow Airport (LHR) .

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

The cheapest round-trip flight from Seattle to London recently found on Google Flights was with Icelandair from $511. The cheapest one-way flight was with British Airways from $375.

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

The cheapest British Airways flight from Seattle to London is $563, flying from Feb 23 to Mar 11.
The cheapest Delta flight from Seattle to London is $616, flying from Feb 19 to Mar 4.
The cheapest Virgin Atlantic flight from Seattle to London is $616, flying from Feb 26 to Mar 12.
The cheapest United flight from Seattle to London is $581, flying from Feb 28 to Mar 13.
The cheapest Turkish Airlines flight from Seattle to London is $743, flying from Mar 5 to Mar 18.
The cheapest Icelandair flight from Seattle to London is $511, flying from Apr 16 to Apr 29.

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

There are 10 British Airways direct flights from Seattle to London per week. Flights are available every day.
There are 7 Delta direct flights from Seattle to London per week. Flights are available every day.
There are 3 Virgin Atlantic direct flights from Seattle to London per week. Flights are available on Monday, Tuesday and Saturday.

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

The cheapest last-minute deal between Seattle and London at price $774 is offered by Icelandair from Fri, Jan 23 to Mon, Jan 26.

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

There are 10 British Airways direct flights from Seattle to London per week. Flights are available every day.
There are 7 Delta direct flights from Seattle to London per week. Flights are available every day.
There are 3 Virgin Atlantic direct flights from Seattle to London per week. Flights are available on Monday, Tuesday and Saturday.

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

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

The cheapest direct (nonstop) round-trip flights between Seattle and London start at $593 from Sun, Feb 22 to Tue, Mar 10 with British Airways.

It's easy to find nonstop flights with Google Flights! Once you've searched for flights from Seattle to London, 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 Seattle and London start at $1,881 from Sun, Apr 19 to Tue, May 5 with Icelandair.

The cheapest economy class round-trip flights between Seattle and London start at $511 from Thu, Apr 16 to Wed, Apr 29.

To book business class trips from Seattle to London, 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 Seattle and London starts at $774 from Fri, Jan 23 to Mon, Jan 26 with Icelandair.

The cheapest last-minute deal between Seattle and London at price $774 is offered by Icelandair from Fri, Jan 23 to Mon, Jan 26.

To find last-minute flight deals from Seattle to London, 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.