AirHint found the following cheapest return flights from Chicago (ORD) to Athens (ATH) in August 2026 (see full year).

Return flights

29 Aug - 19 Sep	Turkish Airlines
31 Aug - 26 Sep	Turkish Airlines
29 Aug - 29 Sep	Turkish Airlines
28 Aug - 19 Sep	Turkish Airlines
30 Aug - 19 Sep	Turkish Airlines
01 Aug - 08 Sep	Air Serbia
30 Aug - 06 Sep	Scandinavian Airlines
10 Aug - 10 Sep	LOT
12 Aug - 27 Aug	LOT
12 Aug - 24 Aug	Air Serbia
10 Aug - 10 Sep	Finnair	direct
01 Aug - 08 Sep	Finnair	direct

Also check the deals for one-way flights from Chicago to Athens in August.

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 August from 467€

Return flights