AirHint found the following cheapest return flights from Montreal (YUL) to Mexico City (MEX) in September 2026 (see full year).
Return flights
| 02 Sep - 09 Sep | United | ||
| 25 Sep - 02 Oct | United | ||
| 03 Sep - 10 Sep | United | ||
| 01 Sep - 08 Sep | Aeromexico | direct | |
| 02 Sep - 09 Sep | Aeromexico | direct | |
| 03 Sep - 10 Sep | Aeromexico | direct |
Also check the deals for one-way flights from Montreal to Mexico City in September.
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