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

Return flights

02 Dec - 08 Dec	Avianca
01 Dec - 08 Dec	Volaris	direct
01 Dec - 13 Dec	Viva
08 Dec - 13 Dec	Viva
01 Dec - 16 Dec	Viva
08 Dec - 16 Dec	Viva
29 Dec - 13 Jan	Viva
29 Dec - 10 Jan	Viva
08 Dec - 23 Dec	Viva
30 Dec - 05 Jan	Copa
08 Dec - 27 Dec	Viva
01 Dec - 20 Dec	Viva
08 Dec - 20 Dec	Viva
22 Dec - 10 Jan	Viva
29 Dec - 03 Jan	Viva
19 Dec - 03 Jan	Viva
22 Dec - 03 Jan	Viva

Also check the deals for one-way flights from Cancun 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 Cancun to San Jose in December from $253

Return flights