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

Return flights

10 Dec - 26 Dec	United
05 Dec - 15 Dec	Frontier Airlines
19 Dec - 02 Jan	Frontier Airlines
20 Dec - 05 Jan	Frontier Airlines
23 Dec - 03 Jan	Frontier Airlines
25 Dec - 30 Dec	Air Canada
04 Dec - 07 Dec	Avianca
29 Dec - 07 Jan	jetBlue
28 Dec - 04 Jan	American Airlines
13 Dec - 09 Jan	United
20 Dec - 03 Jan	Avianca
30 Dec - 03 Jan	Avianca
21 Dec - 02 Jan	Frontier Airlines

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 $646

Return flights