AirHint found the following cheapest return flights from Austin (AUS) to Zagreb (ZAG) in December 2025 (see full year).
Return flights
| 06 Dec - 13 Dec | Delta | ||
| 19 Dec - 10 Jan | Alaska Airlines | ||
| 23 Dec - 27 Dec | Turkish Airlines |
Also check the deals for one-way flights from Austin to Zagreb in December.
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