W4 6066 then U2 1684 at Fiumicino
Prague → Rome → Nice
Timetable, Rome time
17:10W4 6066 from Prague at the gate
14:45U2 1684 to Nice leaves the gate
21 h 35 apart on the timetable, overnight
U2 1684 leaves 21 h 35 after W4 6066 arrives on the timetable: more than half a day, so not a connection we count.