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

Return flights

08 Sep - 16 Sep	Viva
05 Sep - 16 Sep	Volaris
08 Sep - 24 Sep	Volaris
08 Sep - 17 Sep	Volaris
02 Sep - 16 Sep	Viva
12 Sep - 16 Sep	Volaris
23 Sep - 07 Oct	Finnair
01 Sep - 15 Sep	Viva
27 Sep - 25 Oct	Viva
24 Sep - 01 Oct	Finnair
24 Sep - 08 Oct	Finnair
28 Sep - 08 Oct	Finnair
13 Sep - 27 Sep	Delta
14 Sep - 25 Sep	Delta
10 Sep - 17 Sep	Delta
15 Sep - 01 Oct	Delta
25 Sep - 02 Oct	Delta
17 Sep - 02 Oct	Delta
11 Sep - 01 Oct	Delta
16 Sep - 15 Oct	Aeromexico

Also check the deals for one-way flights from Mexico City to Barcelona 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 Barcelona in September from 612€

Return flights