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

Return flights

31 Dec - 15 Jan	Lufthansa
09 Dec - 16 Dec	SWISS
30 Dec - 13 Jan	SWISS
14 Dec - 14 Jan	Iberia
30 Dec - 16 Jan	SWISS
31 Dec - 24 Jan	Iberia
10 Dec - 17 Dec	Lufthansa
13 Dec - 23 Dec	Air France
14 Dec - 15 Jan	Air Canada
14 Dec - 13 Jan	Air Canada
14 Dec - 22 Dec	Air Canada
10 Dec - 11 Jan	KLM
07 Dec - 10 Dec	Iberia
06 Dec - 20 Dec	Scandinavian Airlines
31 Dec - 07 Jan	SWISS
13 Dec - 22 Dec	Air Canada
14 Dec - 24 Dec	British Airways
12 Dec - 22 Dec	Air Canada
01 Dec - 08 Dec	Turkish Airlines
24 Dec - 17 Jan	Scandinavian Airlines

Also check the deals for one-way flights from Chicago 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 Chicago to Athens in December from $455

Return flights