Cheapest return flights from San Francisco to London in May from $612

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

Return flights

12 May - 20 May Air Canada
12 May - 20 May British Airways direct
06 May - 27 May Iberia direct
01 May - 10 May Scandinavian Airlines
02 May - 23 May Scandinavian Airlines
19 May - 02 Jun Air Canada
19 May - 02 Jun British Airways direct
05 May - 30 May Scandinavian Airlines
11 May - 18 May British Airways direct
05 May - 30 May British Airways direct
12 May - 06 Jun British Airways direct
10 May - 30 May Lufthansa
01 May - 10 May British Airways direct
27 May - 03 Jun Flair Airlines
27 May - 03 Jun British Airways direct
15 May - 06 Jun British Airways direct
31 May - 08 Jun Air Canada
31 May - 15 Jun Air Canada
31 May - 15 Jun British Airways direct
31 May - 08 Jun British Airways direct

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

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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