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

Return flights

08 Dec - 11 Dec	Ryanair
01 Dec - 05 Dec	Ryanair
04 Dec - 11 Dec	Ryanair
24 Dec - 30 Dec	Ryanair
12 Dec - 18 Dec	Ryanair
01 Dec - 06 Dec	Ryanair
24 Dec - 31 Dec	Ryanair
09 Dec - 12 Dec	Ryanair
30 Dec - 08 Jan	Ryanair
30 Dec - 10 Jan	Ryanair
22 Dec - 28 Dec	Ryanair
30 Dec - 07 Jan	Ryanair
02 Dec - 08 Dec	Ryanair
30 Dec - 09 Jan	Ryanair
23 Dec - 04 Jan	Ryanair
21 Dec - 04 Jan	Lufthansa
20 Dec - 04 Jan	Lufthansa
30 Dec - 05 Jan	Ryanair
21 Dec - 02 Jan	Austrian Airlines
29 Dec - 02 Jan	Lufthansa

Also check the deals for one-way flights from Zagreb to Keflavik 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 Zagreb to Keflavik in December from 204€

Return flights