FR 6973 then W4 6135 at Fiumicino
Barcelona → Rome → Prague
Timetable, Rome time
12:30FR 6973 from Barcelona at the gate
06:45W4 6135 to Prague leaves the gate
18 h 15 apart on the timetable, overnight
W4 6135 leaves 18 h 15 after FR 6973 arrives on the timetable: more than half a day, so not a connection we count.