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

Return flights

29 Sep - 02 Oct	Finnair
27 Sep - 06 Oct	Finnair
23 Sep - 26 Sep	Iberia
23 Sep - 02 Oct	Iberia
22 Sep - 02 Oct	Iberia
22 Sep - 26 Sep	Iberia
23 Sep - 08 Oct	Iberia
22 Sep - 08 Oct	Iberia
29 Sep - 08 Oct	Iberia
24 Sep - 02 Oct	Iberia
26 Sep - 15 Oct	Volaris
26 Sep - 30 Sep	Volaris
15 Sep - 25 Sep	Finnair
15 Sep - 24 Sep	Finnair
15 Sep - 23 Sep	Finnair
27 Sep - 02 Oct	Finnair
09 Sep - 17 Sep	Finnair
09 Sep - 23 Sep	Finnair
27 Sep - 30 Sep	Volaris
19 Sep - 24 Sep	Finnair

Also check the deals for one-way flights from Mexico City 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 Mexico City to Madrid in September from 629€

Return flights