AirHint found the following cheapest return flights from Mexico City (MEX) to San Salvador (SAL) in December 2025 (see full year).
Return flights
| 31 Dec - 02 Jan | Copa | ||
| 31 Dec - 06 Jan | Copa | ||
| 31 Dec - 02 Jan | Volaris El Salvador | direct | |
| 31 Dec - 06 Jan | Aeromexico | direct |
Also check the deals for one-way flights from Mexico City to San Salvador in December.
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