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

Return flights

29 Sep - 03 Oct	Finnair
13 Sep - 23 Sep	Air Canada
13 Sep - 24 Sep	Air Canada
15 Sep - 22 Sep	Finnair
10 Sep - 17 Sep	Finnair
30 Sep - 07 Oct	Viva
15 Sep - 24 Sep	Finnair
22 Sep - 26 Sep	Finnair
16 Sep - 23 Sep	Air Canada
20 Sep - 30 Sep	Finnair
20 Sep - 03 Oct	Finnair
20 Sep - 25 Sep	Finnair
22 Sep - 03 Oct	Finnair
15 Sep - 25 Sep	Finnair
15 Sep - 03 Oct	Finnair
27 Sep - 01 Oct	Finnair
15 Sep - 01 Oct	Finnair
20 Sep - 01 Oct	Finnair
27 Sep - 07 Oct	Finnair
23 Sep - 01 Oct	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 616€

Return flights