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

Return flights

03 Dec - 07 Dec	SWISS
05 Dec - 09 Dec	SWISS
05 Dec - 07 Dec	SWISS
01 Dec - 11 Dec	SWISS
01 Dec - 07 Dec	SWISS
03 Dec - 09 Dec	SWISS
12 Dec - 14 Dec	SWISS
12 Dec - 15 Dec	SWISS
04 Dec - 07 Dec	SWISS
09 Dec - 14 Dec	SWISS
11 Dec - 18 Jan	KLM
12 Dec - 16 Jan	SWISS
12 Dec - 15 Jan	ITA Airways
13 Dec - 08 Jan	ITA Airways
18 Dec - 11 Jan	ITA Airways
12 Dec - 18 Jan	ITA Airways
12 Dec - 09 Jan	ITA Airways
18 Dec - 17 Jan	Lufthansa
23 Dec - 04 Jan	ITA Airways
26 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 209€

Return flights