AirHint found the following cheapest return flights from Athens (ATH) to Keflavik (KEF) in December 2026 (see full year).

Return flights

07 Dec - 12 Dec	SKY express
05 Dec - 12 Dec	SKY express
08 Dec - 14 Dec	Ryanair
01 Dec - 06 Dec	Ryanair
11 Dec - 18 Dec	SKY express
22 Dec - 31 Dec	Aegean Airlines
23 Dec - 28 Dec	Wizz Air
25 Dec - 01 Jan	Air Serbia
23 Dec - 30 Dec	easyJet
24 Dec - 30 Dec	Wizz Air
24 Dec - 31 Dec	Air Serbia
24 Dec - 02 Jan	Wizz Air
26 Dec - 02 Jan	Ryanair

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.

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Cheapest return flights from Athens to Keflavik in December from 199€

Return flights