Cheapest one-way flights from San Francisco to London in September from $338

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

AirHint found the following cheapest one-way flights from San Francisco (SFO) to London (LHR) in September 2025 (see full year).

One-Way flights

16 Sep Iberia
22 Sep Flair Airlines
14 Sep Scandinavian Airlines
10 Sep Scandinavian Airlines
25 Sep Flair Airlines
15 Sep Scandinavian Airlines
29 Sep Flair Airlines
01 Sep SWISS
20 Sep Hawaiian Airlines
18 Sep jetBlue

Also check the deals for return 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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