Cheapest return flights from San Francisco to London in September from 583€

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 September 2025 (see full year).

Return flights

23 Sep - 02 Oct Air Canada
13 Sep - 16 Oct TAP
21 Sep - 30 Sep Finnair direct
23 Sep - 09 Oct Delta direct
30 Sep - 10 Oct Delta direct
23 Sep - 02 Oct Delta direct
02 Sep - 09 Sep United
02 Sep - 09 Sep Finnair direct
15 Sep - 30 Sep Delta
10 Sep - 23 Sep Delta
30 Sep - 12 Oct Delta direct
01 Sep - 09 Sep Delta direct
09 Sep - 16 Sep SWISS
02 Sep - 16 Sep British Airways direct
10 Sep - 23 Sep British Airways direct
09 Sep - 16 Sep British Airways direct
03 Sep - 01 Oct Delta direct
26 Sep - 06 Oct Delta direct
13 Sep - 16 Oct United direct
27 Sep - 04 Oct United direct

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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