EC 6103 then LH 1734 at Munich
Rome → Munich → Belgrade
Timetable, Munich time
14:05EC 6103 from Rome at the gate
11:20LH 1734 to Belgrade leaves the gate
21 h 15 apart on the timetable, overnight
LH 1734 leaves 21 h 15 after EC 6103 arrives on the timetable: more than half a day, so not a connection we count.