Cheapest return flights from San Francisco to London in September from $608

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

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

Return flights

23 Sep - 07 Oct British Airways
30 Sep - 14 Oct LEVEL
11 Sep - 24 Sep TAP
15 Sep - 22 Sep British Airways
19 Sep - 03 Oct British Airways
20 Sep - 22 Sep LEVEL
11 Sep - 22 Sep TAP
22 Sep - 29 Sep jetBlue
04 Sep - 14 Sep jetBlue
10 Sep - 10 Oct jetBlue
04 Sep - 04 Oct British Airways
01 Sep - 02 Oct jetBlue
03 Sep - 13 Sep TAP
01 Sep - 08 Sep jetBlue
20 Sep - 28 Sep Vueling Airlines
01 Sep - 19 Sep Turkish Airlines

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

Skyscanner

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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