AirHint found the following cheapest return flights from Monterrey (MTY) to San Salvador (SAL) in December 2025 (see full year).
Return flights
| 03 Dec - 08 Dec | Aeromexico | ||
| 05 Dec - 07 Dec | Aeromexico | ||
| 05 Dec - 15 Dec | Volaris | ||
| 24 Dec - 29 Dec | Copa | ||
| 28 Dec - 03 Jan | Copa |
Also check the deals for one-way flights from Monterrey to San Salvador in December.
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