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

Return flights

30 Dec - 12 Jan	Wizz Air
24 Dec - 12 Jan	Wizz Air
30 Dec - 06 Jan	Ryanair
25 Dec - 11 Jan	Wizz Air
25 Dec - 01 Jan	Wizz Air
24 Dec - 31 Dec	LOT
24 Dec - 01 Jan	SKY express
31 Dec - 02 Jan	Ryanair
25 Dec - 04 Jan	Wizz Air
24 Dec - 29 Dec	Wizz Air
29 Dec - 02 Jan	Ryanair
24 Dec - 28 Dec	LOT
26 Dec - 29 Dec	Eurowings
24 Dec - 27 Dec	SKY express
25 Dec - 28 Dec	Aegean Airlines
27 Dec - 30 Dec	Ryanair
26 Dec - 28 Dec	Eurowings

Also check the deals for one-way flights from Thessaloniki 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 Thessaloniki to Keflavik in December from 243€

Return flights