AirHint found the following cheapest return flights from London (LCY) to Zagreb (ZAG) in December 2025 (see full year).

Return flights

31 Dec - 07 Jan	KLM
02 Dec - 22 Dec	KLM
02 Dec - 07 Dec	KLM
02 Dec - 05 Dec	KLM
01 Dec - 05 Dec	KLM
11 Dec - 22 Dec	ITA Airways
08 Dec - 12 Dec	KLM
11 Dec - 12 Jan	ITA Airways
11 Dec - 16 Dec	ITA Airways
29 Dec - 01 Jan	KLM
27 Dec - 31 Dec	KLM
06 Dec - 09 Dec	KLM
05 Dec - 17 Dec	Lufthansa
29 Dec - 06 Jan	KLM
26 Dec - 06 Jan	KLM
27 Dec - 01 Jan	KLM
26 Dec - 09 Jan	KLM
26 Dec - 01 Jan	KLM
27 Dec - 07 Jan	KLM
30 Dec - 10 Jan	Lufthansa

Also check the deals for one-way flights from London to Zagreb 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 Zagreb in December from 223€

Return flights