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

Return flights

14 Sep - 16 Oct	Finnair
29 Sep - 09 Oct	Finnair
07 Sep - 16 Sep	Virgin Atlantic
03 Sep - 09 Sep	Virgin Atlantic
09 Sep - 08 Oct	Virgin Atlantic
02 Sep - 18 Sep	Virgin Atlantic
07 Sep - 22 Sep	Virgin Atlantic
01 Sep - 10 Sep	Virgin Atlantic
30 Sep - 24 Oct	Virgin Atlantic
01 Sep - 11 Sep	Virgin Atlantic
14 Sep - 26 Sep	TAP
10 Sep - 29 Sep	Virgin Atlantic
07 Sep - 16 Sep	Virgin Atlantic	direct
01 Sep - 10 Sep	Virgin Atlantic	direct
29 Sep - 15 Oct	Delta
28 Sep - 08 Oct	Delta
22 Sep - 07 Oct	Delta
28 Sep - 07 Oct	Delta
24 Sep - 15 Oct	Delta
24 Sep - 14 Oct	Delta

Also check the deals for one-way flights from Los Angeles to London 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 Los Angeles to London in September from 415€

Return flights