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

Return flights

16 Dec - 23 Dec	Vueling Airlines
11 Dec - 16 Dec	Lufthansa
11 Dec - 18 Dec	Lufthansa
11 Dec - 13 Dec	Lufthansa
11 Dec - 15 Dec	Lufthansa
04 Dec - 07 Dec	Lufthansa
04 Dec - 13 Dec	Lufthansa
25 Dec - 31 Dec	Lufthansa
05 Dec - 08 Dec	Lufthansa
05 Dec - 12 Dec	Lufthansa
26 Dec - 09 Jan	Lufthansa
26 Dec - 06 Jan	Lufthansa
27 Dec - 07 Jan	Lufthansa
31 Dec - 09 Jan	LOT
31 Dec - 04 Jan	LOT
17 Dec - 04 Jan	LOT
27 Dec - 01 Jan	Lufthansa
27 Dec - 04 Jan	LOT
26 Dec - 03 Jan	LOT
26 Dec - 02 Jan	LOT

Also check the deals for one-way flights from London 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 London to Ljubljana in December from 163€

Return flights