AirHint found the following cheapest return flights from Mexico City (MEX) to San Juan (SJU) in December 2026 (see full year).
Return flights
| 05 Dec - 09 Dec | Arajet | ||
| 10 Dec - 15 Dec | Avianca | ||
| 11 Dec - 15 Dec | Avianca | ||
| 30 Dec - 09 Jan | Copa | ||
| 05 Dec - 27 Dec | Copa | ||
| 18 Dec - 27 Dec | Copa | ||
| 13 Dec - 21 Dec | Copa | ||
| 19 Dec - 30 Dec | Avianca |
Also check the deals for one-way flights from Mexico City to San Juan in December.
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