AirHint found the following cheapest return flights from Boston (BOS) to San Salvador (SAL) in March 2026 (see full year).
Return flights
| 24 Mar - 31 Mar | United | ||
| 24 Mar - 08 Apr | Copa | ||
| 16 Mar - 01 Apr | Avianca | direct | |
| 02 Mar - 09 Mar | Avianca | direct | |
| 01 Mar - 08 Mar | Avianca | direct | |
| 06 Mar - 15 Mar | Frontier Airlines |
Also check the deals for one-way flights from Boston to San Salvador in March.
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