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

Return flights

24 Dec - 31 Dec	Wizz Air
31 Dec - 09 Jan	Wizz Air
24 Dec - 06 Jan	Wizz Air
31 Dec - 07 Jan	Wizz Air
25 Dec - 31 Dec	SKY express
24 Dec - 02 Jan	Wizz Air
30 Dec - 07 Jan	Wizz Air
31 Dec - 04 Jan	Wizz Air
24 Dec - 03 Jan	Wizz Air
26 Dec - 31 Dec	Scandinavian Airlines
24 Dec - 29 Dec	Wizz Air
28 Dec - 06 Jan	Wizz Air
30 Dec - 04 Jan	Wizz Air
29 Dec - 02 Jan	Wizz Air
25 Dec - 28 Dec	Aegean Airlines
24 Dec - 27 Dec	Wizz Air
23 Dec - 28 Dec	Ryanair
23 Dec - 27 Dec	Jet2
24 Dec - 26 Dec	Wizz Air
23 Dec - 24 Dec	Aegean Airlines

Also check the deals for one-way flights from Athens 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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik

Cheapest return flights from Athens to Keflavik in December from 256€

Return flights