Cheapest return flights from Boston to San Salvador in December from $223

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

Return flights

08 Dec - 13 Dec Spirit Airlines
10 Dec - 13 Dec Spirit Airlines
07 Dec - 12 Dec Spirit Airlines
08 Dec - 17 Dec Spirit Airlines
10 Dec - 17 Dec Spirit Airlines
08 Dec - 21 Dec Spirit Airlines
08 Dec - 25 Dec Spirit Airlines
10 Dec - 21 Dec Spirit Airlines
10 Dec - 25 Dec Spirit Airlines
08 Dec - 29 Dec Spirit Airlines
31 Dec - 16 Jan Spirit Airlines
31 Dec - 15 Jan Spirit Airlines
29 Dec - 16 Jan Frontier Airlines
31 Dec - 13 Jan Spirit Airlines
30 Dec - 12 Jan Spirit Airlines
30 Dec - 16 Jan Frontier Airlines
31 Dec - 16 Jan Avianca direct
28 Dec - 14 Jan Arajet
30 Dec - 15 Jan Spirit Airlines
28 Dec - 15 Jan Frontier Airlines

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

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