EU destinations operated by A320 may needs technical stop at ATH, for example this QR263
https://www.flightradar24.com/QTR263/34c36b6e
It will take additional around 2 hours for the trip, what a long travel
Edit: Opps, QR189 operated by A320 to VIE also needs technical stop at ATH too
https://www.flightradar24.com/QTR189/34c36c19