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

Return flights

12 Dec - 13 Dec	Ryanair
12 Dec - 18 Dec	Ryanair
05 Dec - 13 Dec	Ryanair
05 Dec - 11 Dec	Ryanair
12 Dec - 19 Dec	Ryanair
12 Dec - 16 Dec	Ryanair
08 Dec - 13 Dec	Ryanair
31 Dec - 07 Jan	Ryanair
11 Dec - 18 Dec	Ryanair
05 Dec - 12 Dec	Ryanair
01 Dec - 06 Dec	Pegasus Airlines
18 Dec - 10 Jan	Ryanair
29 Dec - 15 Jan	Pegasus Airlines
18 Dec - 06 Jan	Ryanair
30 Dec - 07 Jan	Pegasus Airlines
29 Dec - 06 Jan	Pegasus Airlines
20 Dec - 07 Jan	Ryanair
19 Dec - 07 Jan	Ryanair
24 Dec - 15 Jan	Eurowings
23 Dec - 06 Jan	Ryanair

Also check the deals for one-way flights from Cologne 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 Cologne to Athens in December from 101€

Return flights