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

Return flights

06 Dec - 07 Dec	Lufthansa
06 Dec - 09 Dec	Lufthansa
03 Dec - 10 Dec	Lufthansa
31 Dec - 08 Jan	Lufthansa
06 Dec - 08 Dec	Lufthansa
05 Dec - 08 Dec	Croatia Airlines	direct
05 Dec - 16 Dec	Croatia Airlines
05 Dec - 07 Dec	Croatia Airlines
26 Dec - 31 Dec	Lufthansa
10 Dec - 17 Dec	Lufthansa
25 Dec - 31 Dec	Lufthansa
27 Dec - 11 Jan	Austrian Airlines
29 Dec - 10 Jan	KLM
29 Dec - 10 Jan	Croatia Airlines	direct
27 Dec - 03 Jan	LOT
30 Dec - 03 Jan	LOT
28 Dec - 01 Jan	Lufthansa
23 Dec - 03 Jan	LOT
29 Dec - 05 Jan	Croatia Airlines
20 Dec - 10 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 $222

Return flights