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

Return flights

01 Dec - 04 Dec	easyJet
01 Dec - 06 Dec	easyJet
04 Dec - 08 Dec	Ryanair
03 Dec - 08 Dec	Wizz Air
08 Dec - 14 Dec	easyJet
01 Dec - 07 Dec	easyJet
16 Dec - 21 Dec	Wizz Air
14 Dec - 18 Dec	easyJet
21 Dec - 28 Dec	Ryanair
20 Dec - 25 Dec	Ryanair
30 Dec - 05 Jan	Wizz Air
30 Dec - 06 Jan	Wizz Air
29 Dec - 04 Jan	LOT
30 Dec - 02 Jan	Wizz Air
26 Dec - 02 Jan	Wizz Air
25 Dec - 04 Jan	Aegean Airlines
25 Dec - 03 Jan	Wizz Air
28 Dec - 05 Jan	easyJet

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 156€

Return flights