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

Return flights

09 Dec - 16 Dec	Delta
05 Dec - 12 Dec	Delta
08 Dec - 15 Dec	Delta
06 Dec - 13 Dec	Delta
07 Dec - 14 Dec	Delta
10 Dec - 17 Dec	Delta
11 Dec - 18 Dec	Delta
15 Dec - 22 Dec	Virgin Atlantic
16 Dec - 23 Dec	Delta
24 Dec - 17 Jan	Frontier Airlines
19 Dec - 11 Jan	Frontier Airlines
23 Dec - 17 Jan	Frontier Airlines
31 Dec - 06 Jan	Delta
30 Dec - 06 Jan	Delta
12 Dec - 19 Dec	KLM
09 Dec - 03 Jan	Frontier Airlines
25 Dec - 04 Jan	Frontier Airlines
29 Dec - 06 Jan	Delta

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 432€

Return flights