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

Return flights

24 Dec - 31 Dec	Ryanair
24 Dec - 12 Jan	Ryanair
30 Dec - 12 Jan	Ryanair
25 Dec - 31 Dec	Wizz Air
16 Dec - 22 Dec	Wizz Air
10 Dec - 14 Dec	Ryanair
31 Dec - 18 Jan	Ryanair
24 Dec - 30 Dec	Ryanair
19 Dec - 30 Dec	Ryanair
31 Dec - 06 Jan	LOT
24 Dec - 29 Dec	Ryanair
18 Dec - 28 Dec	Ryanair
19 Dec - 29 Dec	Ryanair
12 Dec - 19 Dec	Ryanair
25 Dec - 04 Jan	Aegean Airlines
26 Dec - 05 Jan	Wizz Air
25 Dec - 11 Jan	transavia
27 Dec - 04 Jan	Ryanair

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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik

Cheapest return flights from Thessaloniki to Keflavik in December from $319

Return flights