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

Return flights

08 Sep - 29 Sep	British Airways
18 Sep - 29 Sep	British Airways
24 Sep - 29 Sep	British Airways
22 Sep - 07 Oct	British Airways
17 Sep - 29 Sep	British Airways
03 Sep - 29 Sep	British Airways
25 Sep - 29 Sep	British Airways
22 Sep - 29 Sep	British Airways
23 Sep - 29 Sep	British Airways
11 Sep - 29 Sep	British Airways
10 Sep - 29 Sep	British Airways
11 Sep - 07 Oct	British Airways
23 Sep - 09 Oct	Iberia
04 Sep - 09 Oct	Iberia
11 Sep - 09 Oct	Iberia
26 Sep - 07 Oct	British Airways
22 Sep - 10 Oct	Iberia
17 Sep - 17 Oct	Iberia
04 Sep - 02 Oct	Iberia
26 Sep - 19 Oct	British Airways

Also check the deals for one-way flights from Madrid to Mexico City 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 Madrid to Mexico City in September from 512€

Return flights