AirHint found the following cheapest return flights from Quito (UIO) to San Salvador (SAL) in December 2025 (see full year).
Return flights
| 15 Dec - 09 Jan | Avianca | ||
| 11 Dec - 13 Dec | Avianca | ||
| 10 Dec - 14 Dec | Copa | ||
| 10 Dec - 14 Dec | Avianca | direct | |
| 28 Dec - 01 Jan | Copa | ||
| 27 Dec - 02 Jan | Avianca |
Also check the deals for one-way flights from Quito to San Salvador in December.
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