A3 751 then LH 1279 at Athens
Copenhagen → Athens → Frankfurt am Main
Timetable, Athens time
15:45A3 751 from Copenhagen at the gate
13:30LH 1279 to Frankfurt am Main leaves the gate
21 h 45 apart on the timetable, overnight
LH 1279 leaves 21 h 45 after A3 751 arrives on the timetable: more than half a day, so not a connection we count.