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

Return flights

04 Dec - 07 Dec	Avianca	direct
03 Dec - 16 Dec	Frontier Airlines
06 Dec - 14 Dec	Frontier Airlines
07 Dec - 10 Dec	jetBlue
01 Dec - 06 Dec	Avianca	direct
07 Dec - 14 Dec	Frontier Airlines
02 Dec - 06 Dec	Frontier Airlines
06 Dec - 09 Dec	Avianca	direct
05 Dec - 08 Dec	Avianca	direct
06 Dec - 19 Dec	Avianca	direct
31 Dec - 13 Jan	Copa
13 Dec - 10 Jan	jetBlue
16 Dec - 05 Jan	Avianca
31 Dec - 11 Jan	Avianca
19 Dec - 10 Jan	Frontier Airlines
25 Dec - 25 Jan	Frontier Airlines
18 Dec - 01 Jan	Frontier Airlines
28 Dec - 18 Jan	Frontier Airlines
31 Dec - 11 Jan	Avianca	direct
30 Dec - 10 Jan	Avianca

Also check the deals for one-way flights from New York 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 New York to San Salvador in December from 251€

Return flights