AirHint found the following cheapest return flights from London (STN) to Los Angeles (LAX) in September 2025 (see full year).

Return flights

10 Sep - 15 Sep	Fly Play
19 Sep - 27 Sep	Fly Play
19 Sep - 21 Sep	Fly Play
05 Sep - 15 Sep	Fly Play
24 Sep - 27 Sep	Fly Play
17 Sep - 22 Sep	Fly Play
03 Sep - 09 Sep	Fly Play
18 Sep - 21 Sep	Fly Play
25 Sep - 27 Sep	Fly Play
12 Sep - 27 Sep	Fly Play
25 Sep - 02 Oct	Ryanair
24 Sep - 02 Oct	Fly Play
24 Sep - 08 Oct	Ryanair
27 Sep - 06 Oct	Fly Play
25 Sep - 12 Oct	Ryanair
18 Sep - 05 Oct	Ryanair
17 Sep - 01 Oct	Ryanair
22 Sep - 01 Oct	Ryanair
20 Sep - 12 Oct	Ryanair
22 Sep - 10 Oct	Ryanair

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 450€

Return flights