Cheapest return flights from Boston to San Salvador in December from $285

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

Return flights

07 Dec - 19 Dec Spirit Airlines
17 Dec - 16 Jan Spirit Airlines
29 Dec - 09 Jan Spirit Airlines
07 Dec - 19 Dec Avianca direct
24 Dec - 10 Jan Spirit Airlines
20 Dec - 27 Dec Frontier Airlines
24 Dec - 11 Jan Spirit Airlines
17 Dec - 08 Jan jetBlue
26 Dec - 12 Jan Spirit Airlines
27 Dec - 03 Jan Sun Country Airlines
15 Dec - 25 Dec Spirit Airlines
21 Dec - 14 Jan Spirit Airlines
25 Dec - 03 Jan Spirit Airlines
28 Dec - 04 Jan Spirit Airlines
21 Dec - 25 Dec Spirit Airlines

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

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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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