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

Return flights

12 May - 20 May	Iberia
19 May - 26 May	Iberia
06 May - 19 May	SWISS
03 May - 11 May	Air Canada
07 May - 15 May	Turkish Airlines
02 May - 12 May	Air Canada
08 May - 19 May	Turkish Airlines
03 May - 23 May	Iberia
09 May - 16 May	Scandinavian Airlines
01 May - 13 May	British Airways
17 May - 06 Jun	Air Canada
27 May - 07 Jun	Air Serbia
23 May - 06 Jun	Air Serbia
25 May - 01 Jun	Air Serbia
23 May - 13 Jun	Air Serbia
31 May - 09 Jun	TAP
31 May - 10 Jun	TAP
26 May - 13 Jun	Scandinavian Airlines
26 May - 03 Jun	Scandinavian Airlines
31 May - 08 Jun	TAP

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 $501

Return flights