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

Return flights

13 May - 20 May	Air Canada
20 May - 27 May	Air Canada
05 May - 12 May	Air Canada
18 May - 27 May	Air Canada
11 May - 21 May	Air Canada
01 May - 08 May	Turkish Airlines
03 May - 23 May	SWISS
01 May - 07 May	Turkish Airlines
01 May - 18 May	SWISS
03 May - 10 May	Turkish Airlines
15 May - 06 Jun	Scandinavian Airlines
23 May - 01 Jun	Air Serbia
18 May - 13 Jun	Lufthansa
20 May - 03 Jun	Lufthansa
30 May - 08 Jun	Air Serbia
30 May - 20 Jun	Air Serbia
31 May - 08 Jun	TAP
31 May - 14 Jun	TAP
22 May - 05 Jun	TAP
20 May - 03 Jun	British Airways	direct

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

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 May from 440€

Return flights