Cheapest return flights from Boston to San Salvador in December from 446€

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

Return flights

15 Dec - 17 Dec Spirit Airlines
14 Dec - 19 Dec Spirit Airlines
15 Dec - 24 Dec Spirit Airlines
15 Dec - 21 Dec Frontier Airlines
14 Dec - 17 Dec Spirit Airlines
16 Dec - 17 Dec Spirit Airlines
15 Dec - 18 Dec Spirit Airlines
12 Dec - 17 Dec Spirit Airlines
15 Dec - 23 Dec Spirit Airlines
15 Dec - 19 Dec Spirit Airlines
18 Dec - 19 Jan Allegiant Air
18 Dec - 15 Jan Allegiant Air
20 Dec - 10 Jan Allegiant Air
21 Dec - 05 Jan jetBlue
15 Dec - 04 Jan Frontier Airlines
29 Dec - 15 Jan Spirit Airlines
20 Dec - 05 Jan Allegiant Air
30 Dec - 15 Jan Spirit Airlines
15 Dec - 03 Jan Spirit Airlines
15 Dec - 05 Jan Spirit Airlines

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

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