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

Return flights

28 Dec - 11 Jan	Scandinavian Airlines
12 Dec - 09 Jan	Austrian Airlines
12 Dec - 23 Dec	Scandinavian Airlines
25 Dec - 08 Jan	British Airways
12 Dec - 05 Jan	British Airways
12 Dec - 02 Jan	Scandinavian Airlines
10 Dec - 04 Jan	SWISS
18 Dec - 25 Dec	United
12 Dec - 04 Jan	SWISS
13 Dec - 04 Jan	SWISS
11 Dec - 04 Jan	SWISS
12 Dec - 03 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 461€

Return flights