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

Return flights

14 Dec - 16 Dec	Vueling Airlines
10 Dec - 16 Dec	Wizz Air
12 Dec - 16 Dec	Wizz Air
11 Dec - 15 Dec	easyJet
11 Dec - 16 Dec	easyJet
07 Dec - 11 Dec	Air France
09 Dec - 16 Dec	Vueling Airlines
07 Dec - 16 Dec	Air Serbia
07 Dec - 12 Dec	Air France
02 Dec - 08 Dec	Lufthansa
18 Dec - 10 Jan	Air Serbia
18 Dec - 11 Jan	Air Serbia
16 Dec - 06 Jan	Vueling Airlines
18 Dec - 05 Jan	Air Serbia
30 Dec - 05 Jan	Vueling Airlines
25 Dec - 01 Jan	Air Serbia
21 Dec - 06 Jan	Vueling Airlines
22 Dec - 01 Jan	Air Serbia
25 Dec - 06 Jan	Vueling Airlines
26 Dec - 04 Jan	Air Serbia

Also check the deals for one-way flights from Ljubljana 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 Ljubljana to Lisbon in December from $134

Return flights