Cheapest return flights from San Francisco to London in May from $628

Best time to book flights for San Francisco (SFO) to London (LHR) flights at AirHint

AirHint found the following cheapest return flights from San Francisco (SFO) to London (LHR) in May 2025 (see full year).

Return flights

03 May - 13 May Air Canada
01 May - 15 May American Airlines
13 May - 20 May American Airlines
07 May - 21 May American Airlines
04 May - 19 May Air Canada
13 May - 20 May Finnair direct
01 May - 15 May Iberia direct
03 May - 13 May Iberia direct
04 May - 19 May American Airlines direct
07 May - 21 May Iberia direct
20 May - 03 Jun Lufthansa
20 May - 03 Jun Iberia direct
27 May - 09 Jun TAP
23 May - 04 Jun TAP
29 May - 19 Jun TAP
25 May - 08 Jun WestJet
27 May - 09 Jun Finnair direct
25 May - 08 Jun Finnair direct
29 May - 19 Jun British Airways direct
23 May - 04 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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