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

Return flights

29 Sep - 23 Oct	Iberia
23 Sep - 07 Oct	Iberia
29 Sep - 18 Oct	Iberia
23 Sep - 02 Oct	Iberia
23 Sep - 08 Oct	Iberia
02 Sep - 12 Sep	Finnair
07 Sep - 24 Sep	Iberia
17 Sep - 24 Sep	Iberia
16 Sep - 24 Sep	Iberia
09 Sep - 24 Sep	Iberia
21 Sep - 02 Oct	Air Canada
08 Sep - 15 Sep	Viva
18 Sep - 30 Sep	Volaris
08 Sep - 26 Sep	Finnair
06 Sep - 20 Sep	Alaska Airlines
04 Sep - 20 Sep	Alaska Airlines
07 Sep - 31 Oct	Iberia
22 Sep - 16 Oct	Iberia
22 Sep - 02 Oct	Iberia
14 Sep - 04 Oct	Iberia

Also check the deals for one-way flights from Monterrey 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 Monterrey to Madrid in September from $817

Return flights