BT 633 then FR 9903 at Fiumicino
Riga → Rome → Lisbon
Timetable, Rome time
14:10BT 633 from Riga at the gate
14:00FR 9903 to Lisbon leaves the gate
23 h 50 apart on the timetable, overnight
FR 9903 leaves 23 h 50 after BT 633 arrives on the timetable: more than half a day, so not a connection we count.