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

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

Return flights

10 Sep - 15 Sep Scandinavian Airlines
18 Sep - 01 Oct Scandinavian Airlines
10 Sep - 15 Sep Iberia direct
18 Sep - 01 Oct Finnair 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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