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

Return flights

11 Dec - 18 Dec	Copa
04 Dec - 11 Dec	Avianca
30 Dec - 06 Jan	Copa
30 Dec - 04 Jan	Avianca
09 Dec - 13 Dec	Avianca
15 Dec - 18 Dec	Copa
06 Dec - 08 Dec	Avianca
29 Dec - 05 Jan	Copa
04 Dec - 08 Dec	Spirit Airlines
04 Dec - 05 Dec	Spirit Airlines
27 Dec - 04 Jan	Avianca
04 Dec - 12 Dec	Spirit Airlines
23 Dec - 29 Dec	Avianca
26 Dec - 01 Jan	Avianca
25 Dec - 03 Jan	Avianca
27 Dec - 03 Jan	Avianca
11 Dec - 12 Dec	Spirit Airlines
30 Dec - 14 Jan	Spirit Airlines
30 Dec - 15 Jan	Spirit Airlines
30 Dec - 19 Jan	Spirit Airlines

Also check the deals for one-way flights from San Jose to San Juan 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 San Jose to San Juan in December from 184€

Return flights