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	easyJet
01 Dec - 08 Dec	Wizz Air
08 Dec - 11 Dec	easyJet
08 Dec - 14 Dec	easyJet
10 Dec - 14 Dec	easyJet
01 Dec - 05 Dec	KLM
06 Dec - 09 Dec	easyJet
31 Dec - 05 Jan	easyJet
05 Dec - 09 Dec	Wizz Air
04 Dec - 07 Dec	Ryanair
12 Dec - 14 Dec	easyJet
18 Dec - 24 Dec	easyJet
30 Dec - 05 Jan	Wizz Air
27 Dec - 01 Jan	easyJet
28 Dec - 01 Jan	easyJet
29 Dec - 04 Jan	Wizz Air
30 Dec - 03 Jan	easyJet
29 Dec - 03 Jan	easyJet
28 Dec - 03 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 $235

Return flights