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

Return flights

16 Dec - 04 Jan	Vueling Airlines
16 Dec - 18 Dec	Vueling Airlines
23 Dec - 04 Jan	Vueling Airlines
05 Dec - 09 Dec	easyJet
16 Dec - 25 Dec	Vueling Airlines
30 Dec - 04 Jan	Vueling Airlines
16 Dec - 01 Jan	Vueling Airlines
23 Dec - 25 Dec	Vueling Airlines
23 Dec - 01 Jan	Vueling Airlines
28 Dec - 04 Jan	Vueling Airlines
30 Dec - 01 Jan	Vueling Airlines
28 Dec - 01 Jan	Vueling Airlines
19 Dec - 29 Dec	easyJet
19 Dec - 28 Dec	Ryanair

Also check the deals for one-way flights from Lisbon to Ljubljana 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 Lisbon to Ljubljana in December from $202

Return flights