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

Return flights

03 Dec - 07 Dec	ITA Airways
10 Dec - 14 Dec	ITA Airways
10 Dec - 31 Jan	ITA Airways
05 Dec - 07 Dec	ITA Airways
06 Dec - 07 Dec	KLM
04 Dec - 11 Dec	SWISS
16 Dec - 07 Jan	ITA Airways
03 Dec - 12 Dec	ITA Airways
11 Dec - 14 Dec	ITA Airways
17 Dec - 20 Dec	ITA Airways
03 Dec - 10 Jan	SWISS
18 Dec - 07 Jan	ITA Airways
12 Dec - 17 Dec	ITA Airways
12 Dec - 19 Dec	SWISS
31 Dec - 05 Jan	SWISS
31 Dec - 03 Jan	KLM
30 Dec - 01 Jan	ITA Airways
29 Dec - 01 Jan	ITA Airways
30 Dec - 03 Jan	KLM
19 Dec - 05 Jan	Lufthansa

Also check the deals for one-way flights from London to Athens 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 Athens in December from $275

Return flights