Maybe you are trying to find flights to ATH or flights from Paris or even flights Paris ATH. From ATH you can also fly to Milan Malpensa, Lyon, and Split.
"One-way tickets, taxes included, limited places subject to availability and payment with Visa Debit. Prices shown on this page correspond with the cheapest available fare for the selected date. The seats for this fare are limited. Click on “Book flight” and you’ll get the price for the selected flights, which will be shown in the “Summary” section on the following page."