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

Return flights

27 Dec - 15 Jan	Avianca
30 Dec - 13 Jan	Avianca
28 Dec - 30 Dec	Avianca
20 Dec - 30 Dec	Avianca	direct
21 Dec - 29 Dec	Avianca	direct
31 Dec - 10 Jan	Avianca
31 Dec - 08 Jan	Avianca
26 Dec - 30 Dec	Avianca
26 Dec - 14 Jan	Avianca
25 Dec - 30 Dec	Avianca
20 Dec - 27 Dec	Avianca	direct
21 Dec - 28 Dec	Avianca	direct
25 Dec - 28 Dec	Avianca
25 Dec - 31 Dec	Avianca
29 Dec - 13 Jan	Viva
29 Dec - 10 Jan	Viva
22 Dec - 27 Dec	Viva
29 Dec - 11 Jan	Avianca
28 Dec - 10 Jan	Viva
22 Dec - 10 Jan	Viva

Also check the deals for one-way flights from Mexico City to San Jose 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 San Jose in December from 217€

Return flights