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

Return flights

30 Sep - 23 Oct	Iberia
28 Sep - 09 Oct	Delta
30 Sep - 21 Oct	Delta
30 Sep - 15 Oct	British Airways
29 Sep - 16 Oct	Air Canada
26 Sep - 17 Oct	Delta
29 Sep - 20 Oct	Delta
29 Sep - 06 Oct	Delta
28 Sep - 06 Oct	Delta
26 Sep - 03 Oct	British Airways
26 Sep - 29 Sep	British Airways
26 Sep - 30 Sep	British Airways
23 Sep - 30 Sep	Air Canada
21 Sep - 30 Sep	FrenchBee
25 Sep - 28 Sep	Turkish Airlines
21 Sep - 27 Sep	Norse Atlantic Airways
21 Sep - 28 Sep	FrenchBee
22 Sep - 28 Sep	Norse Atlantic Airways (UK)
20 Sep - 29 Sep	Norse Atlantic Airways
22 Sep - 30 Sep	ITA Airways

Also check the deals for one-way flights from Los Angeles to Madrid 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 Madrid in September from $431

Return flights