AirHint found the following cheapest return flights from San Luis Potosi (SLP) to Madrid (MAD) in September 2025 (see full year).

Return flights

15 Sep - 09 Oct	Delta
14 Sep - 15 Oct	Delta
07 Sep - 21 Sep	Delta
08 Sep - 30 Sep	Aeromexico
07 Sep - 30 Sep	Aeromexico
10 Sep - 22 Sep	Aeromexico
22 Sep - 29 Sep	Aeromexico
01 Sep - 10 Sep	Aeromexico
17 Sep - 08 Oct	Aeromexico
12 Sep - 21 Sep	Aeromexico
16 Sep - 09 Oct	Delta
06 Sep - 01 Oct	Delta
18 Sep - 02 Oct	Delta

Also check the deals for one-way flights from San Luis Potosi 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.

Book a cheap hotel in Madrid

Cheap car rent in Madrid

Cheapest return flights from San Luis Potosi to Madrid in September from $899

Return flights