London, UK to Seattle, USA for only £377 roundtrip

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Cheap flights from London, UK to Seattle, USA for only £377 roundtrip.

The example dates listed below range between £377 and £388 roundtrip.

DEPART:
London, UK

ARRIVE:
Seattle, USA

RETURN:
London, UK

DATES:
Availability from October 2026 to January 2027 (excluding Christmas/New Year)

Example dates:
1st-8th Oct
2nd-9th Oct
4th-11th Oct
6th-13th Oct
8th-15th Oct
9th-16th Oct
10th-17th Oct
11th-18th Oct
12th-19th Oct
13th-20th Oct
14th-21st Oct
15th-22nd Oct
19th-26th Oct
20th-27th Oct
21st-28th Oct
22nd-29th Oct
23rd-30th Oct
28th Oct – 4th Nov
1st-8th Nov
4th-11th Nov
5th-12th Nov
6th-13th Nov
11th-18th Nov
12th-19th Nov
17th-24th Nov
20th-27th Nov
22nd-29th Nov
23rd-30th Nov
24th Nov – 1st Dec
26th Nov – 3rd Dec
2nd-9th Dec
3rd-10th Dec
4th-11th Dec
17th-24th Dec
31st Dec – 7th Jan

and more…

STOPS:
Reykjavik

AIRLINES:
Icelandair