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

Return flights

05 Dec - 10 Dec	Avianca	direct
03 Dec - 07 Dec	Avianca
10 Dec - 15 Dec	Avianca	direct
04 Dec - 08 Dec	Avianca	direct
31 Dec - 09 Jan	Avianca
04 Dec - 07 Dec	Avianca	direct
04 Dec - 15 Dec	Avianca	direct
05 Dec - 08 Dec	Avianca
03 Dec - 12 Dec	Avianca
01 Dec - 09 Dec	Avianca
08 Dec - 17 Dec	Avianca
31 Dec - 07 Jan	Avianca
17 Dec - 08 Jan	Avianca
17 Dec - 10 Jan	Avianca
24 Dec - 01 Jan	Avianca
31 Dec - 04 Jan	Avianca	direct
30 Dec - 05 Jan	Avianca
30 Dec - 13 Jan	Avianca
25 Dec - 04 Jan	Avianca	direct
25 Dec - 01 Jan	Avianca

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 199€

Return flights