AirHint found the following cheapest return flights from Seattle (SEA) to Florence (FLR) in September 2026 (see full year).
Return flights
| 18 Sep - 02 Oct | Scandinavian Airlines | ||
| 11 Sep - 18 Sep | Scandinavian Airlines | ||
| 10 Sep - 24 Sep | Scandinavian Airlines | ||
| 09 Sep - 16 Sep | Condor | ||
| 10 Sep - 17 Sep | Alaska Airlines |
Also check the deals for one-way flights from Seattle to Florence in September.
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