Cheapest return flights from San Francisco to London in September from $591

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

Return flights

21 Sep - 30 Sep Scandinavian Airlines
08 Sep - 16 Sep Scandinavian Airlines
08 Sep - 26 Sep Scandinavian Airlines
06 Sep - 20 Sep Scandinavian Airlines
24 Sep - 28 Sep Scandinavian Airlines
23 Sep - 28 Sep Scandinavian Airlines
08 Sep - 17 Sep Scandinavian Airlines
28 Sep - 12 Oct Scandinavian Airlines
03 Sep - 07 Sep Scandinavian Airlines
08 Sep - 17 Sep American Airlines direct
08 Sep - 16 Sep Air France direct
25 Sep - 04 Oct Aer Lingus
24 Sep - 05 Oct Air France direct
25 Sep - 04 Oct Air France direct

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

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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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