Flights from London to Seattle Tacoma with Icelandair

Our cheapest offers for flights from London to Seattle Tacoma

Here you can compare cheap flights from London (LON) to Seattle Tacoma (SEA) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Seattle Tacoma. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
London
Seattle-Tacoma
Outbound
23/01/26
1 Stopover (KEF)
FI0471, FI0681
13h 05min
Return
31/01/26
1 Stopover (KEF)
FI0680, FI0470
12h 20min
Icelandair
£411
London
Seattle-Tacoma
Outbound
29/12/25
2 Stopovers (KEF, YVR)
FI0451, FI0697, AS2122
16h 23min
Return
15/01/26
1 Stopover (KEF)
FI0680, FI0454
20h 55min
Icelandair, Alaska Airlines
£2,146
Prices based on recent searches, subject to last-minute changes
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Important flight information

Flight information: London - Seattle-Tacoma

Outbound and return from £410.99
Flight duration min. 09:50 / max. 09:55
Return flight duration min. 09:20/ max. 09:30
Distance 7721 km
Flights per week 19
Departure airport Airport London (LCY, LGW, LHR, LTN, STN, SEN) (LON)
Arrival airport Airport Seattle-Tacoma (SEA)
Destination country Flights to United States
Alternative routes to United States
Alternative flights to Seattle-Tacoma
Flight destinations with a similar price