A3 781 then LH 1279 at Athens
Zagreb → Athens → Frankfurt am Main
Timetable, Athens time
18:00A3 781 from Zagreb at the gate
13:30LH 1279 to Frankfurt am Main leaves the gate
19 h 30 apart on the timetable, overnight
LH 1279 leaves 19 h 30 after A3 781 arrives on the timetable: more than half a day, so not a connection we count.