AirHint found the following cheapest return flights from Guadalajara (GDL) to Lisbon (LIS) in December 2025 (see full year).
Return flights
| 01 Dec - 12 Dec | Finnair | ||
| 17 Dec - 07 Jan | Viva | ||
| 29 Dec - 11 Jan | Volaris | ||
| 25 Dec - 05 Jan | Viva | ||
| 22 Dec - 04 Jan | Viva | ||
| 16 Dec - 01 Jan | Volaris |
Also check the deals for one-way flights from Guadalajara to Lisbon in December.
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