FR 1199 then FR 4437 at Fiumicino
Athens → Rome → Riga
Timetable, Rome time
11:35FR 1199 from Athens at the gate
06:00FR 4437 to Riga leaves the gate
18 h 25 apart on the timetable, overnight
FR 4437 leaves 18 h 25 after FR 1199 arrives on the timetable: more than half a day, so not a connection we count.