AirHint found the following cheapest return flights from Monterrey (MTY) to Lisbon (LIS) in September 2026 (see full year).
Return flights
| 22 Sep - 08 Oct | Iberia | ||
| 28 Sep - 14 Oct | Aeromexico | ||
| 14 Sep - 26 Sep | Viva | ||
| 01 Sep - 16 Sep | Aeromexico | ||
| 21 Sep - 29 Sep | Viva | ||
| 07 Sep - 15 Sep | Viva |
Also check the deals for one-way flights from Monterrey to Lisbon in September.
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