Cheap flights from London to Seattle

November is the cheapest month on this route, sitting in the quiet stretch between the autumn school break and the Christmas run-up. Fares are listed month by month from September through August, so you can see for yourself how the summer peak and the December holidays lift prices. Compare midweek departures with weekend ones before you commit, and if your dates are flexible, steer around the Thanksgiving week in the United States and the UK half-term breaks. Summer and Christmas travel rewards booking well ahead; a November trip can often be left later.

The carriers listed on this route are Icelandair, Lufthansa, American Airlines, KLM Royal Dutch Airlines, Delta Air Lines, United Airlines, Virgin Atlantic, Lufthansa City Airlines, Finnair and Air Transat. It is a mix of European and North American airlines, and most are full-service rather than low-cost, so a checked bag and seat selection are not automatically part of the base fare. Some fly nonstop between London and Seattle Tacoma; others sell a single ticket that connects through their own hub, which usually means a longer journey but sometimes a lower fare. Read the fare rules before you compare, because what is included differs from one carrier to the next.

Seattle Tacoma is the airport you land at, and it is the only one serving the city, so there is no wrong choice at that end. It lies south of downtown, and the drive into the centre can slow to a crawl in the morning and evening rush. Rail, bus, taxi and rideshare all link the terminal area with the city; the rail line is the simplest way to skip the traffic. Coming back, remember that London spreads its departures across Heathrow, Gatwick, Stansted, Luton and London City, so confirm your airport before you arrange a transfer or a night near the terminal.

Currency

USD ($)

Power sockets

Type A, B · 120 V

Language

Samoan, Hawaiian, Chamorro, Carolinian, Spanish

Emergency number

911

Driving side

right

Calling code

+1

Internet domain

.us

Population of Seattle

737 k (2020)

Time zone

UTC-08 (America/Los_Angeles)

Country facts: Wikidata

• Check which of the five London airports your departure uses, since Heathrow, Gatwick, Stansted, Luton and London City are not interchangeable.
• Confirm whether your ticket is nonstop or connects, and how long the layover runs.
• If you book the legs on separate tickets, leave a generous buffer in case the first flight is delayed.
• Look at what the fare includes for checked baggage and seat selection, because transatlantic fares differ sharply.
• Make sure your passport and any entry authorisation the United States requires are valid before you pay.
• Compare November with the summer months on the price calendar before you fix your dates.