AirHint found the following cheapest return flights from Seattle (SEA) to Florence (FLR) in December 2025 (see full year).
Return flights
| 07 Dec - 14 Dec | Air Canada | ||
| 07 Dec - 25 Dec | SWISS | ||
| 23 Dec - 30 Dec | Alaska Airlines | ||
| 19 Dec - 10 Jan | Alaska Airlines | ||
| 16 Dec - 27 Dec | Hawaiian Airlines | ||
| 26 Dec - 02 Jan | Lufthansa | ||
| 19 Dec - 02 Jan | WestJet |
Also check the deals for one-way flights from Seattle to Florence in December.
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