Cheapest return flights from London to San Francisco in May from $527

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

Return flights

06 May - 10 May SWISS
01 May - 10 May SWISS
12 May - 19 May SWISS
02 May - 11 May SWISS
08 May - 19 May SWISS
14 May - 21 May SWISS
21 May - 26 May SWISS
04 May - 18 May SWISS
20 May - 27 May SWISS
18 May - 25 May SWISS
26 May - 09 Jun SWISS
28 May - 08 Jun SWISS
21 May - 06 Jun SWISS
21 May - 07 Jun SWISS
20 May - 06 Jun SWISS
15 May - 07 Jun SWISS
30 May - 07 Jun SWISS
26 May - 04 Jun SWISS
28 May - 13 Jun SWISS
28 May - 10 Jun ITA Airways

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

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