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

Return flights

04 Dec - 09 Dec	Avianca	direct
06 Dec - 13 Dec	Avianca
06 Dec - 10 Dec	Avianca
05 Dec - 07 Dec	Avianca	direct
05 Dec - 10 Dec	Avianca
04 Dec - 12 Dec	Avianca	direct
01 Dec - 09 Dec	Avianca
03 Dec - 10 Dec	Avianca
02 Dec - 10 Dec	Avianca
01 Dec - 08 Dec	Avianca
31 Dec - 04 Jan	Avianca	direct
21 Dec - 09 Jan	Avianca
23 Dec - 01 Jan	Avianca
26 Dec - 05 Jan	Avianca
26 Dec - 03 Jan	Volaris Costa Rica
26 Dec - 04 Jan	Avianca	direct
28 Dec - 03 Jan	Avianca
26 Dec - 02 Jan	Volaris Costa Rica
23 Dec - 01 Jan	Aeromexico	direct
26 Dec - 03 Jan	Avianca	direct

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 208€

Return flights