Cheapest return flights from London to San Francisco in September from $565

AirHint found the following cheapest return flights from London (LCY) to San Francisco (SFO) in September 2026 (see full year).

Return flights

07 Sep - 16 Sep SWISS
08 Sep - 17 Sep SWISS
02 Sep - 09 Sep SWISS
29 Sep - 15 Oct SWISS
25 Sep - 30 Sep SWISS
19 Sep - 28 Sep SWISS
01 Sep - 22 Sep SWISS
19 Sep - 30 Sep SWISS
18 Sep - 29 Sep SWISS
06 Sep - 16 Sep Aer Lingus
28 Sep - 08 Oct ITA Airways
19 Sep - 29 Sep SWISS
26 Sep - 03 Oct Delta
30 Sep - 05 Oct SWISS
23 Sep - 03 Oct SWISS
28 Sep - 03 Oct SWISS
25 Sep - 10 Oct SWISS
18 Sep - 03 Oct SWISS
25 Sep - 04 Oct KLM
14 Sep - 04 Oct Condor

Also check the deals for one-way flights from London to San Francisco in September.

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