San Francisco to London, UK for only $423 roundtrip

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Cheap flights from San Francisco to London, UK for only $423 roundtrip with TAP Air Portugal.

DEPART:
San Francisco, USA

ARRIVE:
London, UK

RETURN:
San Francisco, USA

DATES:
Availability from November 2025 to February 2026 (excluding Christmas/New Year)

Example dates:
12th-19th Nov
12th-20th Nov
28th Nov – 5th Dec
29th Nov – 7th Dec
3rd-10th Dec
16th-23rd Jan
23rd-30th Jan
23rd-31st Jan
24th-31st Jan
18th-25th Feb

and more…

STOPS:
Lisbon

AIRLINES:
TAP Air Portugal