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

Return flights

15 Dec - 26 Jan	Viva
14 Dec - 26 Jan	Aeromexico
16 Dec - 26 Jan	Viva
17 Dec - 26 Jan	Viva
18 Dec - 26 Jan	Viva
19 Dec - 26 Jan	Volaris
29 Dec - 11 Jan	Viva
21 Dec - 26 Jan	Avianca
24 Dec - 15 Jan	Aeromexico
20 Dec - 26 Jan	Volaris
17 Dec - 24 Dec	Volaris
19 Dec - 28 Dec	Volaris
22 Dec - 29 Dec	Viva

Also check the deals for one-way flights from Mexico City to Lisbon 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 Lisbon in December from $975

Return flights