AirHint found the following cheapest one-way flights from Miami (MIA) to San Salvador (SAL) in December 2025 (see full year).
One-Way flights
| 10 Dec | Avianca | ||
| 26 Dec | Avianca | ||
| 15 Dec | Avianca | ||
| 26 Dec | Frontier Airlines | direct | |
| 27 Dec | Avianca | direct | |
| 15 Dec | Avianca | direct | |
| 09 Dec | United | ||
| 20 Dec | Avianca | direct |
Also check the deals for return flights from Miami to San Salvador in December.
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