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

Return flights

11 Sep - 18 Sep	TAP
13 Sep - 21 Sep	Scandinavian Airlines
28 Sep - 06 Oct	Scandinavian Airlines
22 Sep - 06 Oct	Iberia	direct
17 Sep - 21 Sep	Scandinavian Airlines
21 Sep - 28 Sep	Air Canada
05 Sep - 26 Sep	Scandinavian Airlines
04 Sep - 14 Sep	TAP
16 Sep - 23 Sep	Scandinavian Airlines
02 Sep - 06 Sep	Scandinavian Airlines
07 Sep - 20 Sep	Iberia	direct
13 Sep - 03 Oct	British Airways	direct
07 Sep - 03 Oct	Iberia	direct
12 Sep - 20 Sep	Air Canada
28 Sep - 06 Oct	Delta	direct
09 Sep - 01 Oct	Air Canada
09 Sep - 01 Oct	Delta	direct

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 $607

Return flights