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

Return flights

31 Dec - 05 Jan	Wizz Air
23 Dec - 30 Dec	easyJet
22 Dec - 28 Dec	easyJet
24 Dec - 28 Dec	Wizz Air
28 Dec - 30 Dec	Wizz Air
20 Dec - 28 Dec	easyJet
29 Dec - 01 Jan	Wizz Air
23 Dec - 02 Jan	Ryanair
25 Dec - 28 Dec	easyJet
26 Dec - 02 Jan	Wizz Air
30 Dec - 03 Jan	Wizz Air
29 Dec - 03 Jan	Wizz Air
27 Dec - 02 Jan	Wizz Air
27 Dec - 30 Dec	easyJet

Also check the deals for one-way flights from Basel 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 Basel to Keflavik in December from 380€

Return flights