Cheapest return flights from San Francisco to London in May from 399€

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

Return flights

07 May - 21 May TAP
07 May - 22 May TAP
01 May - 22 May TAP
07 May - 17 May SWISS
07 May - 10 May Air France
12 May - 18 May LEVEL
13 May - 19 May Alaska Airlines
01 May - 12 May SWISS
20 May - 27 May Aer Lingus
26 May - 30 May LEVEL
26 May - 15 Jun SWISS
29 May - 07 Jun SWISS

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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