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

Return flights

22 Sep - 15 Oct	Viva
23 Sep - 30 Sep	Viva
22 Sep - 02 Oct	Viva
23 Sep - 08 Oct	Viva
30 Sep - 08 Oct	Viva
30 Sep - 07 Oct	Viva
17 Sep - 24 Sep	Aeromexico
15 Sep - 22 Sep	Viva
29 Sep - 21 Oct	Viva
26 Sep - 30 Sep	Volaris
30 Sep - 09 Oct	Viva
20 Sep - 26 Sep	Aeromexico
28 Sep - 06 Oct	Viva
24 Sep - 07 Oct	Volaris
22 Sep - 03 Oct	Viva
16 Sep - 24 Sep	Volaris
09 Sep - 16 Sep	Volaris
12 Sep - 24 Sep	Viva
13 Sep - 28 Sep	Viva
12 Sep - 17 Sep	Viva

Also check the deals for one-way flights from Mexico City to Dublin 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 Dublin in September from $714

Return flights