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

Return flights

10 Dec - 14 Dec	SWISS
12 Dec - 16 Dec	SWISS
12 Dec - 14 Dec	SWISS
11 Dec - 14 Dec	Lufthansa
05 Dec - 08 Dec	SWISS
10 Dec - 13 Dec	SWISS
01 Dec - 07 Dec	SWISS
11 Dec - 30 Dec	KLM
11 Dec - 15 Dec	KLM
26 Dec - 30 Dec	KLM
22 Dec - 15 Jan	Lufthansa
22 Dec - 08 Jan	Lufthansa
29 Dec - 08 Jan	Lufthansa
31 Dec - 16 Jan	KLM
11 Dec - 05 Jan	KLM
26 Dec - 05 Jan	KLM
18 Dec - 07 Jan	KLM
18 Dec - 05 Jan	KLM
30 Dec - 16 Jan	Lufthansa
16 Dec - 07 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 225€

Return flights