AirHint found the following cheapest return flights from Seattle (SEA) to Florence (FLR) in May 2026 (see full year).

Return flights

01 May - 23 May	Scandinavian Airlines
06 May - 13 May	Lufthansa
13 May - 20 May	Lufthansa
05 May - 12 May	British Airways
12 May - 19 May	British Airways
03 May - 10 May	Icelandair
01 May - 08 May	Icelandair
08 May - 15 May	Lufthansa
04 May - 11 May	British Airways
07 May - 14 May	British Airways
26 May - 02 Jun	Alaska Airlines
27 May - 03 Jun	Alaska Airlines
29 May - 05 Jun	Harbour Air
25 May - 01 Jun	Alaska Airlines
28 May - 04 Jun	Harbour Air
30 May - 06 Jun	Scandinavian Airlines
31 May - 07 Jun	Harbour Air

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

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 Seattle to Florence in May from $612

Return flights