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

Return flights

06 Dec - 17 Dec	KLM
05 Dec - 17 Dec	KLM
02 Dec - 22 Dec	KLM
02 Dec - 07 Dec	KLM
02 Dec - 05 Dec	KLM
11 Dec - 22 Dec	ITA Airways
05 Dec - 07 Dec	KLM
26 Dec - 23 Jan	KLM
08 Dec - 23 Dec	KLM
06 Dec - 23 Dec	KLM
10 Dec - 23 Dec	Lufthansa
29 Dec - 01 Jan	KLM
26 Dec - 07 Jan	KLM
26 Dec - 09 Jan	KLM
29 Dec - 09 Jan	KLM
16 Dec - 09 Jan	KLM
17 Dec - 12 Jan	Lufthansa
26 Dec - 01 Jan	KLM
12 Dec - 06 Jan	KLM
15 Dec - 09 Jan	KLM

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 228€

Return flights