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

Return flights

08 Dec - 21 Jan	British Airways
14 Dec - 24 Jan	British Airways
04 Dec - 13 Dec	Iberia
28 Dec - 20 Jan	Air France
28 Dec - 22 Jan	Air France
01 Dec - 01 Jan	British Airways
15 Dec - 05 Jan	British Airways
21 Dec - 02 Jan	British Airways
23 Dec - 02 Jan	Iberia
17 Dec - 27 Dec	British Airways
17 Dec - 29 Dec	British Airways
12 Dec - 04 Jan	British Airways
20 Dec - 31 Dec	British Airways
24 Dec - 01 Jan	Air France
18 Dec - 26 Dec	Iberia
19 Dec - 28 Dec	British Airways

Also check the deals for one-way flights from Mexico City to Dublin in December.

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 December from 643€

Return flights