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

Return flights

09 Dec - 08 Jan	Wizz Air
08 Dec - 15 Dec	easyJet
01 Dec - 08 Dec	easyJet
06 Dec - 14 Dec	easyJet
04 Dec - 07 Dec	easyJet
05 Dec - 07 Dec	Wizz Air
31 Dec - 05 Jan	Wizz Air
16 Dec - 21 Dec	Lufthansa
19 Dec - 29 Dec	Wizz Air
31 Dec - 04 Jan	Wizz Air
15 Dec - 20 Dec	easyJet
21 Dec - 27 Dec	Wizz Air
25 Dec - 31 Dec	easyJet
30 Dec - 04 Jan	easyJet
31 Dec - 03 Jan	Wizz Air
30 Dec - 02 Jan	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 170€

Return flights