AirHint found the following cheapest return flights from Phoenix (PHX) to Warsaw (WAW) in December 2025 (see full year).
Return flights
| 12 Dec - 10 Jan | Frontier Airlines | ||
| 13 Dec - 09 Jan | Frontier Airlines | ||
| 07 Dec - 10 Dec | Scandinavian Airlines | ||
| 30 Dec - 06 Jan | Lufthansa |
Also check the deals for one-way flights from Phoenix to Warsaw in December.
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