Cheapest return flights from Boston to San Salvador in September from $228

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

Return flights

04 Sep - 16 Sep Copa
06 Sep - 16 Sep United
08 Sep - 18 Sep Avianca
01 Sep - 14 Sep Avianca
05 Sep - 14 Sep Avianca
07 Sep - 17 Sep Spirit Airlines
26 Sep - 29 Sep Avianca direct
06 Sep - 18 Sep Spirit Airlines
06 Sep - 14 Sep Spirit Airlines
08 Sep - 17 Sep Avianca direct

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

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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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