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

Return flights

03 Dec - 08 Dec	Croatia Airlines	direct
10 Dec - 12 Dec	Croatia Airlines
05 Dec - 08 Dec	Croatia Airlines	direct
12 Dec - 15 Dec	KLM
15 Dec - 09 Jan	KLM
08 Dec - 14 Dec	KLM
12 Dec - 14 Dec	KLM
10 Dec - 12 Dec	Croatia Airlines	direct
12 Dec - 15 Dec	Croatia Airlines	direct
24 Dec - 05 Jan	Austrian Airlines
29 Dec - 05 Jan	Austrian Airlines
25 Dec - 28 Dec	Lufthansa
28 Dec - 11 Jan	Brussels Airlines
12 Dec - 19 Dec	LOT
28 Dec - 05 Jan	Brussels Airlines
26 Dec - 04 Jan	KLM
28 Dec - 04 Jan	KLM
29 Dec - 04 Jan	Croatia Airlines
27 Dec - 04 Jan	KLM
25 Dec - 04 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 $190

Return flights