Cheapest return SFO–LHR flights, May

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

Return flights

21 May - 03 Jun LOT
30 May - 01 Jun Scandinavian Airlines
21 May - 02 Jun LOT
21 May - 04 Jun LOT
26 May - 29 May Scandinavian Airlines
27 May - 04 Jun Turkish Airlines
23 May - 25 May Scandinavian Airlines
30 May - 04 Jun Scandinavian Airlines
21 May - 27 May LOT
26 May - 03 Jun TAP
23 May - 31 May Scandinavian Airlines
25 May - 05 Jun Turkish Airlines
28 May - 01 Jun Air Canada
25 May - 08 Jun Turkish Airlines
26 May - 27 May Scandinavian Airlines
22 May - 25 May Turkish Airlines
22 May - 31 May Turkish Airlines
22 May - 26 May Turkish Airlines
22 May - 27 May Turkish Airlines
21 May - 31 May LOT

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

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