A3 707 then GQ 830 at Athens
Bilbao → Athens → Milan
Timetable, Athens time
15:40A3 707 from Bilbao at the gate
14:00GQ 830 to Milan leaves the gate
22 h 20 apart on the timetable, overnight
GQ 830 leaves 22 h 20 after A3 707 arrives on the timetable: more than half a day, so not a connection we count.