AirHint found the following cheapest return flights from Mexico City (MEX) to San Juan (SJU) in December 2026 (see full year).
Return flights
| 03 Dec - 07 Dec | Avianca | ||
| 13 Dec - 20 Dec | Copa | ||
| 29 Dec - 09 Jan | Copa | ||
| 11 Dec - 15 Dec | Copa | ||
| 26 Dec - 10 Jan | Copa |
Also check the deals for one-way flights from Mexico City to San Juan in December.
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