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

Return flights

09 Dec - 07 Jan	Copa
09 Dec - 13 Jan	Copa
10 Dec - 13 Jan	Copa
11 Dec - 13 Jan	Copa
11 Dec - 14 Jan	Copa
11 Dec - 28 Dec	Copa
15 Dec - 14 Jan	Copa
11 Dec - 28 Dec	Avianca	direct
26 Dec - 11 Jan	Copa
10 Dec - 13 Jan	Avianca	direct
09 Dec - 13 Jan	Avianca	direct
22 Dec - 06 Jan	Copa

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 $340

Return flights