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

Return flights

02 Dec - 09 Dec	Air France
02 Dec - 10 Dec	Delta
04 Dec - 11 Dec	Delta
12 Dec - 30 Jan	Delta
31 Dec - 07 Jan	Delta
19 Dec - 11 Jan	Frontier Airlines
03 Dec - 17 Dec	Delta
04 Dec - 18 Dec	Delta
11 Dec - 22 Dec	Delta
23 Dec - 04 Jan	Frontier Airlines
26 Dec - 31 Jan	Delta
19 Dec - 03 Jan	Frontier Airlines
31 Dec - 05 Jan	Delta
12 Dec - 22 Dec	Delta
23 Dec - 26 Dec	Frontier Airlines
01 Dec - 03 Dec	Delta
19 Dec - 22 Dec	Delta
18 Dec - 06 Jan	Delta
21 Dec - 11 Jan	Delta
16 Dec - 05 Jan	Air France

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 514€

Return flights