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

Return flights

05 Sep - 14 Sep	TAP
18 Sep - 28 Sep	TAP
05 Sep - 07 Sep	TAP
01 Sep - 30 Sep	TAP
06 Sep - 14 Sep	TAP
01 Sep - 14 Sep	TAP
18 Sep - 27 Sep	TAP
02 Sep - 07 Sep	TAP
12 Sep - 21 Sep	TAP
26 Sep - 28 Sep	TAP
25 Sep - 04 Oct	TAP
26 Sep - 05 Oct	TAP
26 Sep - 04 Oct	TAP
18 Sep - 05 Oct	TAP
27 Sep - 07 Oct	Scandinavian Airlines
24 Sep - 15 Oct	Ryanair
27 Sep - 02 Oct	Scandinavian Airlines
27 Sep - 09 Oct	Scandinavian Airlines
17 Sep - 01 Oct	Scandinavian Airlines
26 Sep - 10 Oct	Transavia France

Also check the deals for one-way flights from Madrid 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 Madrid to Los Angeles in September from $441

Return flights