A3 781 then LH 1283 at Athens
Zagreb → Athens → Frankfurt am Main
Timetable, Athens time
18:00A3 781 from Zagreb at the gate
17:20LH 1283 to Frankfurt am Main leaves the gate
23 h 20 apart on the timetable, overnight
LH 1283 leaves 23 h 20 after A3 781 arrives on the timetable: more than half a day, so not a connection we count.