Cheapest return flights from San Francisco to London in September from 492€

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

15 Sep - 05 Oct SWISS
04 Sep - 17 Sep Iberia direct
10 Sep - 16 Sep Iberia
11 Sep - 19 Sep Iberia direct
24 Sep - 14 Oct United
01 Sep - 15 Sep Virgin Atlantic
10 Sep - 16 Sep Delta direct
14 Sep - 21 Sep Aer Lingus
13 Sep - 27 Sep Iberia
14 Sep - 21 Sep Iberia direct
14 Sep - 28 Sep Aer Lingus
01 Sep - 08 Sep Aer Lingus
15 Sep - 05 Oct Iberia direct
25 Sep - 08 Oct United
26 Sep - 04 Oct Delta direct
27 Sep - 04 Oct United direct
28 Sep - 05 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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