AirHint found the following cheapest return flights from Boston (BOS) to Florence (FLR) in September 2026 (see full year).

Return flights

03 Sep - 08 Sep	Lufthansa
28 Sep - 05 Oct	Air France
30 Sep - 07 Oct	Air France
29 Sep - 06 Oct	KLM
10 Sep - 20 Sep	ITA Airways
02 Sep - 09 Sep	Air France
23 Sep - 30 Sep	Air France
04 Sep - 12 Sep	Lufthansa
24 Sep - 01 Oct	Air France
27 Sep - 04 Oct	Air France
15 Sep - 22 Sep	Air France
01 Sep - 08 Sep	Air France
05 Sep - 12 Sep	Air France
26 Sep - 03 Oct	Air France
14 Sep - 21 Sep	Air France
25 Sep - 02 Oct	Air France
07 Sep - 14 Sep	KLM

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

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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Cheapest return flights from Boston to Florence in September from $465

Return flights