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

Return flights

01 Dec - 06 Dec	Viva
01 Dec - 09 Dec	Viva
05 Dec - 09 Dec	Viva
04 Dec - 09 Dec	Viva
01 Dec - 13 Dec	Viva
04 Dec - 12 Dec	Aeromexico	direct
06 Dec - 16 Dec	Aeromexico	direct
05 Dec - 15 Dec	Aeromexico	direct
01 Dec - 15 Dec	Aeromexico	direct
10 Dec - 18 Dec	Aeromexico	direct
24 Dec - 02 Jan	Avianca
27 Dec - 05 Jan	Avianca
29 Dec - 13 Jan	Viva
28 Dec - 13 Jan	Viva
25 Dec - 07 Jan	Avianca
30 Dec - 12 Jan	Copa
02 Dec - 09 Jan	Avianca
25 Dec - 04 Jan	Avianca
27 Dec - 15 Jan	Avianca
27 Dec - 12 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.

Book a cheap hotel in San Jose

Cheap car rent in San Jose

Cheapest return flights from Mexico City to San Jose in December from $228

Return flights