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

Return flights

09 Dec - 16 Dec	easyJet
31 Dec - 06 Jan	easyJet
31 Dec - 14 Jan	easyJet
10 Dec - 21 Dec	KLM
06 Dec - 08 Dec	easyJet
04 Dec - 06 Dec	easyJet
15 Dec - 17 Dec	easyJet
05 Dec - 09 Dec	easyJet
08 Dec - 12 Dec	easyJet
12 Dec - 15 Dec	easyJet
06 Dec - 13 Dec	easyJet
06 Dec - 12 Dec	easyJet
21 Dec - 01 Jan	easyJet
28 Dec - 17 Jan	easyJet
11 Dec - 03 Jan	easyJet
31 Dec - 03 Jan	easyJet
27 Dec - 17 Jan	Jet2
21 Dec - 04 Jan	Jet2
26 Dec - 01 Jan	easyJet
25 Dec - 01 Jan	LOT

Also check the deals for one-way flights from Geneva 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 Geneva to Keflavik in December from $186

Return flights