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

Return flights

05 Dec - 07 Dec	SWISS
09 Dec - 14 Dec	Lufthansa
11 Dec - 14 Dec	Lufthansa
09 Dec - 16 Dec	Lufthansa
03 Dec - 15 Dec	Lufthansa
04 Dec - 07 Dec	Lufthansa
05 Dec - 14 Dec	Lufthansa
05 Dec - 09 Dec	Lufthansa
16 Dec - 08 Jan	Lufthansa
18 Dec - 30 Dec	KLM
15 Dec - 21 Dec	Lufthansa
22 Dec - 16 Jan	Lufthansa
29 Dec - 12 Jan	Lufthansa
29 Dec - 09 Jan	Lufthansa
24 Dec - 08 Jan	Lufthansa
22 Dec - 02 Jan	Lufthansa
23 Dec - 05 Jan	Lufthansa
29 Dec - 02 Jan	Lufthansa
15 Dec - 06 Jan	Lufthansa
11 Dec - 04 Jan	KLM

Also check the deals for one-way flights from London to Thessaloniki 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 London to Thessaloniki in December from $269

Return flights