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

Return flights

03 Dec - 09 Dec	SWISS
05 Dec - 09 Dec	SWISS
05 Dec - 14 Dec	SWISS
05 Dec - 07 Dec	SWISS
03 Dec - 07 Dec	SWISS
01 Dec - 09 Dec	SWISS
06 Dec - 11 Dec	SWISS
02 Dec - 09 Dec	SWISS
10 Dec - 14 Dec	SWISS
11 Dec - 14 Dec	KLM
12 Dec - 09 Jan	ITA Airways
15 Dec - 15 Jan	Lufthansa
18 Dec - 04 Jan	ITA Airways
31 Dec - 11 Jan	SWISS
09 Dec - 08 Jan	Lufthansa
11 Dec - 07 Jan	SWISS
15 Dec - 04 Jan	ITA Airways
19 Dec - 06 Jan	SWISS
30 Dec - 12 Jan	Lufthansa
12 Dec - 04 Jan	ITA Airways

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 $255

Return flights