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

Return flights

23 Sep - 16 Oct	Viva
30 Sep - 15 Oct	Viva
15 Sep - 16 Oct	WestJet
23 Sep - 07 Oct	Finnair
19 Sep - 23 Oct	Aeromexico
30 Sep - 09 Oct	Volaris
30 Sep - 07 Oct	Aeromexico
30 Sep - 17 Oct	Viva
28 Sep - 08 Oct	Volaris
16 Sep - 15 Oct	Aeromexico
22 Sep - 25 Sep	Volaris
15 Sep - 30 Sep	WestJet
22 Sep - 30 Sep	Viva
08 Sep - 10 Sep	Iberia
15 Sep - 23 Sep	WestJet
15 Sep - 26 Sep	WestJet
20 Sep - 30 Sep	Volaris
19 Sep - 26 Sep	Volaris
20 Sep - 24 Sep	Viva
15 Sep - 22 Sep	WestJet

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 $727

Return flights