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Cheapest one-way flights from Boston (BOS) to San Salvador (SAL), December

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Dates, airline, and price
Dates	Airline	Price
25 Dec	Frontier Airlines
24 Dec	Frontier Airlines
27 Dec	Arajet
22 Dec	Frontier Airlines
20 Dec	jetBlue
20 Dec	Avianca Direct Flight
18 Dec	Avianca Direct Flight
09 Dec	Avianca Direct Flight
27 Dec	Avianca Direct Flight
25 Dec	Avianca Direct Flight

deals for return flights from Boston to San Salvador in December.

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Updated Aug 25, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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Cheapest one-way flights from Boston (BOS) to San Salvador (SAL), December

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