AirHint found the following cheapest return flights from Phoenix (PHX) to Basel (BSL) in December 2025 (see full year).
Return flights
| 22 Dec - 05 Jan | Hawaiian Airlines | ||
| 21 Dec - 05 Jan | WestJet | ||
| 21 Dec - 04 Jan | WestJet | ||
| 22 Dec - 04 Jan | Hawaiian Airlines |
Also check the deals for one-way flights from Phoenix to Basel in December.
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