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

Return flights

31 Dec - 15 Jan	Avianca
26 Dec - 15 Jan	Avianca
26 Dec - 09 Jan	Avianca
20 Dec - 07 Jan	Volaris Costa Rica
26 Dec - 04 Jan	Volaris El Salvador
01 Dec - 13 Dec	Viva
08 Dec - 13 Dec	Viva
26 Dec - 04 Jan	Volaris El Salvador	direct
01 Dec - 20 Dec	Viva
19 Dec - 24 Dec	Avianca
08 Dec - 20 Dec	Viva
28 Dec - 04 Jan	Avianca
27 Dec - 03 Jan	Avianca
25 Dec - 03 Jan	Avianca
15 Dec - 20 Dec	Viva
08 Dec - 27 Dec	Viva
15 Dec - 27 Dec	Viva
19 Dec - 02 Jan	Avianca
19 Dec - 27 Dec	Viva

Also check the deals for one-way flights from Miami 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 Miami to San Jose in December from 227€

Return flights