AirHint found the following cheapest return flights from Florence (FLR) to Lisbon (LIS) in December 2025 (see full year).

Return flights

31 Dec - 07 Jan	KLM
31 Dec - 02 Jan	KLM
29 Dec - 31 Dec	SWISS
27 Dec - 31 Dec	KLM
30 Dec - 02 Jan	Lufthansa
31 Dec - 05 Jan	KLM
28 Dec - 29 Dec	SWISS
27 Dec - 30 Dec	KLM
30 Dec - 06 Jan	KLM
27 Dec - 14 Jan	Vueling Airlines
27 Dec - 01 Jan	KLM
27 Dec - 15 Jan	Vueling Airlines
31 Dec - 04 Jan	KLM
30 Dec - 03 Jan	KLM
27 Dec - 31 Dec	TAP	direct
28 Dec - 30 Dec	Vueling Airlines
29 Dec - 30 Dec	Vueling Airlines
30 Dec - 30 Dec	Vueling Airlines
28 Dec - 29 Dec	TAP	direct

Also check the deals for one-way flights from Florence to Lisbon in December.

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 Florence to Lisbon in December from 271€

Return flights