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

Return flights

10 Dec - 15 Dec	Volaris Costa Rica
24 Dec - 29 Dec	Volaris El Salvador	direct
10 Dec - 15 Dec	Avianca	direct
15 Dec - 21 Dec	Volaris El Salvador	direct
28 Dec - 04 Jan	Avianca	direct
15 Dec - 04 Jan	Avianca	direct
19 Dec - 22 Dec	Avianca	direct
21 Dec - 28 Dec	Avianca	direct
21 Dec - 27 Dec	Avianca	direct
24 Dec - 31 Dec	Avianca	direct
18 Dec - 05 Jan	Avianca	direct
19 Dec - 05 Jan	Avianca	direct
05 Dec - 08 Dec	Avianca	direct
05 Dec - 07 Dec	Avianca
09 Dec - 01 Jan	Avianca	direct
10 Dec - 02 Jan	Avianca	direct
22 Dec - 09 Jan	Copa
22 Dec - 12 Jan	Copa
28 Dec - 01 Jan	Copa
30 Dec - 02 Jan	Copa

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 $179

Return flights