FR 8561 then FR 4437 at Fiumicino
Valletta → Rome → Riga
Timetable, Rome time
13:05FR 8561 from Valletta at the gate
06:00FR 4437 to Riga leaves the gate
16 h 55 apart on the timetable, overnight
FR 4437 leaves 16 h 55 after FR 8561 arrives on the timetable: more than half a day, so not a connection we count.