AirHint found the following cheapest return flights from London (LCY) to Los Angeles (LAX) in September 2026 (see full year).

Return flights

11 Sep - 13 Sep	SWISS
04 Sep - 20 Sep	SWISS
25 Sep - 27 Sep	SWISS
04 Sep - 13 Sep	SWISS
10 Sep - 13 Sep	SWISS
24 Sep - 27 Sep	SWISS
17 Sep - 27 Sep	SWISS
22 Sep - 29 Sep	SWISS
23 Sep - 29 Sep	SWISS
11 Sep - 21 Sep	SWISS
14 Sep - 14 Oct	SWISS
22 Sep - 05 Oct	SWISS
09 Sep - 07 Oct	SWISS
10 Sep - 06 Oct	SWISS
24 Sep - 01 Oct	SWISS
24 Sep - 08 Oct	SWISS
25 Sep - 03 Oct	SWISS
18 Sep - 04 Oct	Lufthansa
17 Sep - 07 Oct	SWISS
30 Sep - 05 Oct	SWISS

Also check the deals for one-way flights from London to Los Angeles in September.

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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Cheapest return flights from London to Los Angeles in September from 433€

Return flights