AirHint found the following cheapest return flights from San Jose (SJC) to San Salvador (SAL) in December 2025 (see full year).

Return flights

28 Dec - 04 Jan	Alaska Airlines
03 Dec - 10 Dec	Alaska Airlines
06 Dec - 12 Dec	Alaska Airlines
25 Dec - 20 Jan	Copa
24 Dec - 20 Jan	Copa
15 Dec - 07 Jan	Copa
17 Dec - 30 Dec	Copa
26 Dec - 20 Jan	Copa
23 Dec - 20 Jan	Copa
15 Dec - 05 Jan	Copa
14 Dec - 05 Jan	Copa
14 Dec - 06 Jan	Copa
10 Dec - 04 Jan	Copa
17 Dec - 29 Dec	Alaska Airlines
17 Dec - 31 Dec	Alaska Airlines

Also check the deals for one-way flights from San Jose to San Salvador 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 Salvador in December from $912

Return flights