Cheapest one-way flights from London to San Francisco in September from $435

AirHint found the following cheapest one-way flights from London (LCY) to San Francisco (SFO) in September 2026 (see full year).

One-Way flights

11 Sep SWISS
16 Sep SWISS
01 Sep SWISS
08 Sep SWISS
28 Sep SWISS
18 Sep Lufthansa

Also check the deals for return flights from London to San Francisco 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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