Cheapest return flights from Boston to San Salvador in December from 381€

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

Return flights

29 Dec - 21 Jan Frontier Airlines
25 Dec - 26 Dec Spirit Airlines
25 Dec - 27 Dec Spirit Airlines
24 Dec - 07 Jan Frontier Airlines
25 Dec - 28 Dec Spirit Airlines
26 Dec - 07 Jan Frontier Airlines
25 Dec - 06 Jan Frontier Airlines
25 Dec - 07 Jan Spirit Airlines
25 Dec - 31 Dec Spirit Airlines
21 Dec - 28 Dec Frontier Airlines
25 Dec - 11 Jan Spirit Airlines
23 Dec - 21 Jan Frontier Airlines
23 Dec - 17 Jan Frontier Airlines
21 Dec - 11 Jan Frontier Airlines
25 Dec - 08 Jan Spirit Airlines
24 Dec - 31 Dec Spirit Airlines
29 Dec - 31 Dec Spirit Airlines
21 Dec - 25 Dec Spirit Airlines
21 Dec - 26 Dec Spirit Airlines
21 Dec - 27 Dec Spirit Airlines

Also check the deals for one-way flights from Boston to San Salvador in December.

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