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Cheap flights from London to Seattle

24 nonstop flights a week. Operated by 4 airlines, about 10h 10m in the air, 4,785 mi (7,700 km). Tickets from $491, nonstop from $557.

Flights from London to Seattle

Pick a departure date to see flights and seller prices

We search agencies and airlines for your day: nonstop and connecting flights, baggage, departure and arrival times.

Prices by day: London to Seattle

Lowest one-way price in dollars from recent searches, cheap days in green. Press a day to see flights and exact prices.

Filters

Best fares from London to Seattle

Lowest one-way prices found by recent searches for the next 120 days; press a card to search that date

Cheapest one-way $491 20 January 2027, with a connection Cheapest nonstop $557 20 January 2027, Alaska Airlines Cheapest weekend departure $498 Fri, 4 December 2026 Cheapest month January 2027 tickets from $491

London to Seattle at a glance

flight time, from 9h 45m to 10h 30m
10h 10m
straight-line distance
4,785 mi (7,700 km)
flights a week
24
next flight
10 November
first and last departure
09:25 - 14:55
lowest price, with a connection, 20 January
$491
lowest nonstop price
$557
airlines
4

London to Seattle ticket prices by month

Lowest one-way fare found by recent searches

Cheapest month: January 2027, tickets from $491. Prices come from searches over the last few days; check the search for your exact date.

The most expensive month is June 2027: from $572. The average across months is $524.

London to Seattle flight schedule

24 flights a week, 5 seasonal or one-off. Departure and arrival times are local.

FlightDepartsArrivesDurationDaysAircraft
BA 53
British Airways
09:25 London Heathrow, terminal 5
11:25 Seattle-Tacoma International
10h
Tue, Thu, Sat
Boeing 787
DL 21
Delta
12:20 London Heathrow, terminal 3
14:50 Seattle-Tacoma International
10h 30m
Daily
Airbus A330-200
AS 101
Alaska Airlines
14:45 London Heathrow, terminal 3
17:00 Seattle-Tacoma International
10h 15m
Daily
Boeing 787-900
BA 49
British Airways
14:55 London Heathrow, terminal 5
16:50 Seattle-Tacoma International
9h 55m
Daily
Boeing 777-300ER

Seasonal and one-off flights

Not operating in the next two weeks. The first of them is on 28 March.

FlightDepartsArrivesDurationDaysAircraft
BA 53
British Airways
09:50 London Heathrow, terminal 5
11:35 Seattle-Tacoma International
9h 45m
Seasonal
Boeing 787
VS 105
Virgin Atlantic
10:50 London Heathrow, terminal 3
13:10 Seattle-Tacoma International
10h 20m
Seasonal
Airbus A330-900
BA 49
British Airways
16:30 London Heathrow, terminal 5
18:25 Seattle-Tacoma International
9h 55m
Seasonal
Boeing 777-300ER
AS 101
Alaska Airlines
17:00 London Heathrow, terminal 3
19:10 Seattle-Tacoma International
10h 10m
Seasonal
Boeing 787-900
DL 21
Delta
17:45 London Heathrow, terminal 3
20:03 Seattle-Tacoma International
10h 18m
Seasonal
Airbus A330-900

Days of the week are taken from the schedule for the next 14 days; schedules change by season. Seattle is 8 hours behind London. The search shows seat availability and the price for your date.

Airlines flying London to Seattle

Flights a week by schedule and the cheapest nonstop fare of each airline found by recent searches

British Airways10 a week Alaska Airlines7 a week Delta7 a week Virgin Atlanticfrom 28 March

Airports

Where flights from London to Seattle depart and land

Departure from London

London Heathrow LHR

24 flights a week, terminals 3, 5, 14 mi (23 km) from the city centre

About the airport

Arrival in Seattle

Seattle-Tacoma International SEA

24 flights a week, 11 mi (18 km) from the city centre

About the airport

When to visit Seattle

Weather by month

Best time to visit: May, June, July, August and September, +17° to +25° by day. In November it is +10° by day and +5° at night, with 17 rainy days.

Jan
+8° +2° 16 days
Feb
+8° +2° 14 days
Mar
+11° +4° 15 days
Apr
+13° +6° 14 days
May
+17° +9° 11 days
Jun
+21° +12° 7 days
Jul
+25° +15° 1 days
Aug
+25° +15° 6 days
Sep
+21° +13° 7 days
Oct
+15° +9° 14 days
Nov
+10° +5° 17 days
Dec
+8° +4° 20 days

Daytime and night temperatures in °C, rainy days. Months with the most comfortable weather are in green. Long-term averages.

Frequently asked questions

How long is the flight from London to Seattle?
A nonstop flight takes 10 hours 10 minutes on average, from 9h 45m to 10h 30m depending on the flight.
How far is Seattle from London?
4,785 mi (7,700 km) in a straight line between the cities.
Which airlines fly nonstop from London to Seattle?
British Airways (10 a week), Alaska Airlines (7 a week), Delta (7 a week) and Virgin Atlantic.
How many flights a day are there from London to Seattle?
There are 24 a week, about 3.4 a day on average.
When are the first and last flights from London to Seattle?
The first departure is at 09:25 (BA53), the last at 14:55 (BA49). Local time.
What is the cheapest month to fly from London to Seattle?
January 2027: tickets from $491. The most expensive is June 2027, from $572.
What is the cheapest upcoming date to fly from London to Seattle?
20 January 2027 (Wednesday): from $491 one way, with a connection, by recent searches. The search shows the price for your dates.
Which airline is the cheapest from London to Seattle?
Alaska Airlines: nonstop tickets from $557 on 20 January by recent searches. Prices change daily, so compare the sellers in the search.
What is the time difference between London and Seattle?
Seattle is 8 hours behind London. Schedule times on this page are local to each airport.
Which London airport do flights to Seattle leave from?
London Heathrow (24 a week).