AirHint found the following cheapest return flights from London (LCY) to Cluj-napoca (CLJ) in December 2025 (see full year).

Return flights

13 Dec - 11 Jan	SWISS
26 Dec - 29 Dec	Lufthansa
01 Dec - 08 Dec	Air Dolomiti
02 Dec - 04 Dec	Air Dolomiti
24 Dec - 28 Dec	SWISS
05 Dec - 05 Jan	KLM
16 Dec - 19 Dec	KLM
13 Dec - 16 Dec	SWISS
23 Dec - 04 Jan	Lufthansa
28 Dec - 31 Dec	SWISS
18 Dec - 21 Dec	Lufthansa
19 Dec - 22 Dec	Lufthansa
24 Dec - 30 Dec	KLM
21 Dec - 05 Jan	SWISS
29 Dec - 02 Jan	KLM
23 Dec - 02 Jan	KLM
19 Dec - 02 Jan	Lufthansa
12 Dec - 04 Jan	KLM
24 Dec - 03 Jan	SWISS

Also check the deals for one-way flights from London to Cluj-napoca 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 Cluj-napoca in December from 323€

Return flights