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

Return flights

03 Dec - 07 Dec	Avianca	direct
05 Dec - 14 Dec	Avianca	direct
03 Dec - 12 Dec	Avianca	direct
11 Dec - 13 Dec	Avianca	direct
05 Dec - 10 Dec	Avianca	direct
03 Dec - 11 Dec	Avianca	direct
10 Dec - 18 Dec	Avianca	direct
02 Dec - 11 Dec	Avianca	direct
02 Dec - 10 Dec	Avianca	direct
05 Dec - 08 Dec	Avianca	direct
12 Dec - 11 Jan	Avianca
06 Dec - 11 Jan	Avianca
06 Dec - 12 Jan	Avianca
04 Dec - 11 Jan	Avianca
23 Dec - 07 Jan	Avianca
31 Dec - 07 Jan	Avianca
31 Dec - 12 Jan	Avianca
31 Dec - 09 Jan	Avianca	direct
29 Dec - 13 Jan	Viva
29 Dec - 09 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 193€

Return flights