TP 833 then FR 1791 at Lisbon
Rome → Lisbon → Luxembourg
Timetable, Lisbon time
14:30TP 833 from Rome at the gate
06:45FR 1791 to Luxembourg leaves the gate
16 h 15 apart on the timetable, overnight
FR 1791 leaves 16 h 15 after TP 833 arrives on the timetable: more than half a day, so not a connection we count.