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

Return flights

29 Sep - 31 Oct	Volaris
29 Sep - 07 Oct	Viva
30 Sep - 14 Oct	Volaris
27 Sep - 06 Oct	Volaris
28 Sep - 20 Oct	Viva
30 Sep - 15 Oct	Delta
29 Sep - 08 Oct	Volaris
22 Sep - 03 Oct	Finnair
23 Sep - 09 Oct	Iberia
30 Sep - 16 Oct	Iberia
23 Sep - 30 Sep	Aeromexico
21 Sep - 30 Sep	Air Canada
26 Sep - 29 Sep	Air Canada
20 Sep - 27 Sep	Viva
20 Sep - 30 Sep	Viva
25 Sep - 29 Sep	Viva
22 Sep - 30 Sep	Aeromexico
21 Sep - 28 Sep	Viva
25 Sep - 30 Sep	Aeromexico
20 Sep - 25 Sep	Viva

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 725€

Return flights