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

Return flights

30 Sep - 15 Oct	British Airways	direct
29 Sep - 14 Oct	SWISS
29 Sep - 13 Oct	Air Canada
03 Sep - 18 Sep	Brussels Airlines
22 Sep - 03 Oct	British Airways
29 Sep - 07 Oct	Air Canada
28 Sep - 07 Oct	Air Canada
27 Sep - 08 Oct	Air Canada
24 Sep - 01 Oct	Austrian Airlines
24 Sep - 08 Oct	Air France
24 Sep - 10 Oct	Delta
08 Sep - 15 Sep	Austrian Airlines
20 Sep - 30 Sep	SWISS
09 Sep - 16 Sep	British Airways	direct
15 Sep - 24 Sep	Finnair	direct
10 Sep - 23 Sep	British Airways	direct
01 Sep - 12 Sep	SWISS
02 Sep - 19 Sep	Finnair
01 Sep - 10 Sep	Air Canada
01 Sep - 23 Sep	Finnair

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 330€

Return flights