AirHint found the following cheapest return flights from Guadalajara (GDL) to Lisbon (LIS) in December 2025 (see full year).
Return flights
| 04 Dec - 11 Dec | Iberia | ||
| 05 Dec - 15 Dec | Viva | ||
| 05 Dec - 14 Dec | Viva | ||
| 26 Dec - 06 Jan | Viva | ||
| 17 Dec - 07 Jan | Viva | ||
| 05 Dec - 20 Dec | Iberia | ||
| 21 Dec - 31 Dec | Mexicana |
Also check the deals for one-way flights from Guadalajara to Lisbon in December.
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