Captivating aerial view of Westminster Palace, Big Ben, and River Thames in London, UK. — flights from Seattle to London
SeattleLondon, UK

Flights from Seattle to London

Nonstop flights from Seattle (SEA) to London (LHR) take about 10h 8m (7,702 km). Virgin Atlantic flies it. Lowest fare seen: $695 one-way, nonstop (12 Oct 2026).

All flights from Seattle →All flights to London →

Book from $695 one-way

Photo of London: Gianluca Pugliese on Pexels.

When you land in London

The airport transfer and the few things worth sorting before you fly.

British Airways Airbus A320 landing at Heathrow, London on a clear day. — arriving in London

Airport transfer

LHR → London, booked before you fly

A private driver meets you in arrivals at a price agreed when you book. Book with Welcome Pickups.

See transfer prices
Alaska Airlines plane soaring through a bright sky with fluffy clouds in Seattle. — lounges at Seattle AirportSeattle Airport · 2 lounges
Before you flyAirport lounges at Seattle →
Trains, buses and taxi faresLHR to London: getting into town →Early arrival or late flightLuggage storage in London →354 drop-off points, from £1.90

Things to book in London

All 222 things to do in London →
Explore the lush interior of London’s iconic Kew Gardens greenhouse with vibrant foliage and architectural design.from €29.55
Kew Gardens 4.7 · 8,345 Tiqets reviews
Iconic Big Ben tower enveloped in fog with bustling London street scene.from €5.50
Big Ben 4.5 · 6,051 Tiqets reviews
The Gherkin and historic buildings in London under a bright blue sky.from €20.33
The Gherkin 4.6 · 5,318 Tiqets reviews
Close-up of a luxurious gold crown adorned with intricate designs and jewels, symbolizing royalty and opulence.from €17.73
The Crown Jewels 4.7 · 4,642 Tiqets reviews

Find hotels in London

Hotels, hostels & more · Trip.com

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Airlines flying Seattle to London

Carriers on SEA–LHR according to our route data and nonstop fares seen as of 12 Oct 2026. Not a complete list.

✈ Virgin Atlanticnonstop fare seen

Seattle to London fares by month

Cheapest month seen for a nonstop flight: Dec 2026, from $697 one-way. With stops: Dec 2026, from $353. Lowest one-way fares seen for departures in each month, read 15 Oct 2026.

DepartingNonstop fromCheaper with stops
Oct 2026$75215 Oct 2026$414 · 2 stops15 Oct 2026
Nov 2026$74222 Nov 2026 · British Airways$369 · 1 stop22 Nov 2026
Dec 2026$69711 Dec 2026$353 · 2 stops11 Dec 2026

From Travelpayouts flight-search data, city to city (Seattle to London, any airport), USD, read 15 Oct 2026. These are fares that were on sale, not a guarantee of today's price; an airline is named only where we know it flies this route.

Best time to fly to London

Based on weather and travel conditions in UK

Jan
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Best monthsGoodAvoid if possible

UK is a great destination year-round. Check local weather patterns before booking and consider shoulder seasons for lower prices and fewer crowds.

More for this trip

Frequently asked questions — Seattle to London flights

How long is the flight from Seattle to London?
A nonstop flight from Seattle (SEA) to London (LHR) takes about 10h 8m, covering 7,702 km. That is an estimate from the distance — actual time varies with the airline, aircraft and winds, and connecting itineraries take longer.
How far is Seattle from London by air?
The great-circle distance between Seattle–Tacoma International Airport and London Heathrow Airport is 7,702 km (4,786 miles), a ultra long-haul route.
Which airlines fly from Seattle to London?
Airlines with flights or nonstop fares on the SEA–LHR route include Virgin Atlantic. This is not a complete list — schedules change by season, so check the current options before booking.
How much does a flight from Seattle to London cost?
The lowest one-way fare seen recently on SEA–LHR was $695 USD sold by Alaska Airlines (nonstop), departing 11 Dec 2026, found in fare searches as of 12 Oct 2026. Fares change constantly and depend on the date, so check the current price before booking.
Do I need a visa to travel from Seattle to UK?
It depends on your passport. Some nationalities can enter UK visa-free or get a visa on arrival; others must apply in advance. Use AirConnect's Visa Checker to see the rules for your passport.
What is the best time to visit London?
UK is a great destination year-round. Check local weather patterns before booking and consider shoulder seasons for lower prices and fewer crowds.

Sources: fares from Travelpayouts flight-search data, seen 12 Oct 2026; airlines from each carrier's published network and nonstop fares on sale; distance from OurAirports coordinates; flight time estimated from distance. Fares change daily.

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