AirHint found the following cheapest return flights from Portland (PDX) to Zagreb (ZAG) in December 2025 (see full year).
Return flights
| 29 Dec - 09 Jan | Lufthansa | ||
| 28 Dec - 12 Jan | Lufthansa | ||
| 28 Dec - 08 Jan | Lufthansa | ||
| 26 Dec - 16 Jan | KLM | ||
| 28 Dec - 10 Jan | KLM | ||
| 27 Dec - 11 Jan | Hawaiian Airlines |
Also check the deals for one-way flights from Portland to Zagreb in December.
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