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

Return flights

09 Dec - 14 Dec	Avianca	direct
11 Dec - 14 Dec	Avianca	direct
11 Dec - 16 Dec	Avianca	direct
09 Dec - 16 Dec	Avianca	direct
12 Dec - 17 Dec	Avianca	direct
05 Dec - 07 Dec	Avianca	direct
09 Dec - 10 Dec	Avianca	direct
05 Dec - 15 Dec	Avianca
11 Dec - 15 Dec	Avianca
08 Dec - 14 Dec	Avianca	direct
08 Dec - 17 Jan	Avianca	direct
10 Dec - 23 Jan	Avianca
31 Dec - 14 Jan	Avianca
07 Dec - 31 Jan	Avianca	direct
13 Dec - 01 Jan	Avianca	direct
25 Dec - 01 Jan	Avianca
26 Dec - 01 Jan	Avianca
28 Dec - 01 Jan	Avianca	direct
31 Dec - 10 Jan	Avianca
07 Dec - 10 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 188€

Return flights