Cheapest return flights from Seattle to Florence in September from $611

AirHint found the following cheapest return flights from Seattle (SEA) to Florence (FLR) in September 2025 (see full year).

Return flights

10 Sep - 17 Sep Aer Lingus
16 Sep - 23 Sep Aer Lingus
17 Sep - 24 Sep Aer Lingus
04 Sep - 14 Oct Scandinavian Airlines
08 Sep - 15 Sep Aer Lingus
22 Sep - 29 Sep Aer Lingus
09 Sep - 16 Sep Aer Lingus
24 Sep - 01 Oct Icelandair
11 Sep - 18 Sep Aer Lingus
05 Sep - 12 Sep Aer Lingus
29 Sep - 06 Oct Icelandair
07 Sep - 14 Sep Aer Lingus
01 Sep - 08 Sep KLM
25 Sep - 02 Oct British Airways

Also check the deals for one-way flights from Seattle to Florence in September.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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