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

Return flights

09 Dec - 15 Dec	Ryanair
09 Dec - 11 Dec	Ryanair
08 Dec - 11 Dec	Ryanair
14 Dec - 18 Dec	Ryanair
02 Dec - 09 Dec	Ryanair
06 Dec - 11 Dec	Ryanair
17 Dec - 21 Dec	Ryanair
15 Dec - 18 Dec	Ryanair
30 Dec - 09 Jan	Ryanair
17 Dec - 08 Jan	Ryanair
13 Dec - 18 Dec	Ryanair
13 Dec - 16 Dec	Ryanair
29 Dec - 05 Jan	Ryanair
31 Dec - 08 Jan	Pegasus Airlines
31 Dec - 06 Jan	Pegasus Airlines
31 Dec - 09 Jan	Pegasus Airlines
30 Dec - 02 Jan	Ryanair
17 Dec - 02 Jan	Ryanair
26 Dec - 01 Jan	Ryanair
27 Dec - 04 Jan	Ryanair

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 $251

Return flights