W4 3611 then W4 6003 at Fiumicino
Suceava → Rome → London Luton
Timetable, Rome time
20:00W4 3611 from Suceava at the gate
12:10W4 6003 to London Luton leaves the gate
16 h 10 apart on the timetable, overnight
W4 6003 leaves 16 h 10 after W4 3611 arrives on the timetable: more than half a day, so not a connection we count.