AirHint found the following cheapest return flights from Montreal (YUL) to Buenos Aires (EZE) in December 2026 (see full year).
Return flights
| 03 Dec - 10 Dec | Copa | ||
| 02 Dec - 09 Dec | United | ||
| 04 Dec - 11 Dec | Avianca | ||
| 06 Dec - 13 Dec | Avianca | ||
| 01 Dec - 08 Dec | Copa | ||
| 07 Dec - 14 Dec | Avianca | ||
| 11 Dec - 02 Jan | Avianca | ||
| 28 Dec - 06 Jan | Avianca |
Also check the deals for one-way flights from Montreal to Buenos Aires in December.
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