AirHint found the following cheapest return flights from Innsbruck (INN) to Lisbon (LIS) in December 2025 (see full year).
Return flights
| 10 Dec - 17 Dec | easyJet | ||
| 11 Dec - 17 Dec | easyJet | ||
| 10 Dec - 14 Dec | easyJet | ||
| 05 Dec - 08 Dec | easyJet | ||
| 26 Dec - 01 Jan | KLM | ||
| 31 Dec - 03 Jan | easyJet | ||
| 25 Dec - 28 Dec | transavia |
Also check the deals for one-way flights from Innsbruck to Lisbon in December.
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