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

Return flights

05 May - 19 May	SWISS
03 May - 18 May	Air Canada
02 May - 18 May	Scandinavian Airlines
18 May - 25 May	Scandinavian Airlines
15 May - 24 May	Scandinavian Airlines
13 May - 27 May	British Airways
05 May - 12 May	United
15 May - 23 May	Scandinavian Airlines
07 May - 15 May	SWISS
10 May - 24 May	British Airways
29 May - 07 Jun	jetBlue
25 May - 02 Jun	Scandinavian Airlines
28 May - 07 Jun	Scandinavian Airlines
25 May - 02 Jun	American Airlines	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.

Book a cheap hotel in Athens

Cheap car rent in Athens

Cheapest return flights from Chicago to Athens in May from $539

Return flights