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

Return flights

08 Dec - 12 Dec	Volaris
03 Dec - 14 Dec	Aeromexico
11 Dec - 22 Dec	Viva
08 Dec - 15 Dec	Viva
01 Dec - 07 Dec	Aeromexico
13 Dec - 23 Dec	Volaris
03 Dec - 17 Dec	Viva
30 Dec - 10 Jan	Aeromexico
30 Dec - 08 Jan	Aeromexico
08 Dec - 17 Dec	Viva
15 Dec - 24 Dec	Aeromexico
14 Dec - 26 Dec	Viva
27 Dec - 08 Jan	Volaris
27 Dec - 06 Jan	Viva
25 Dec - 01 Jan	Aeromexico
27 Dec - 05 Jan	Viva
27 Dec - 03 Jan	Aeromexico
28 Dec - 04 Jan	Aeromexico
27 Dec - 04 Jan	Volaris
18 Dec - 02 Jan	Aeromexico

Also check the deals for one-way flights from Mexico City to Keflavik 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 Keflavik in December from $1073

Return flights