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

Return flights

10 Dec - 17 Dec	easyJet
08 Dec - 12 Dec	easyJet
07 Dec - 09 Dec	easyJet
11 Dec - 18 Dec	KLM
08 Dec - 14 Dec	easyJet
10 Dec - 13 Dec	easyJet
08 Dec - 13 Dec	easyJet
31 Dec - 06 Jan	LOT
09 Dec - 13 Dec	easyJet
16 Dec - 17 Dec	easyJet
20 Dec - 06 Jan	LOT
13 Dec - 19 Dec	easyJet
29 Dec - 06 Jan	LOT
29 Dec - 10 Jan	LOT
30 Dec - 10 Jan	easyJet
18 Dec - 06 Jan	easyJet
23 Dec - 01 Jan	SWISS
22 Dec - 01 Jan	LOT
27 Dec - 06 Jan	LOT
27 Dec - 01 Jan	LOT

Also check the deals for one-way flights from Zurich 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 Zurich to Keflavik in December from $320

Return flights