AirHint found the following cheapest return flights from Graz (GRZ) to Helsinki (HEL) in December 2025 (see full year).
Return flights
| 01 Dec - 08 Dec | Austrian Airlines | ||
| 30 Dec - 06 Jan | Air Dolomiti | ||
| 28 Dec - 04 Jan | Austrian Airlines |
Also check the deals for one-way flights from Graz to Helsinki in December.
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