EC 7668 then U2 7617 at Lisbon
Luxembourg → Lisbon → Nice
Timetable, Lisbon time
21:55EC 7668 from Luxembourg at the gate
17:00U2 7617 to Nice leaves the gate
19 h 05 apart on the timetable, overnight
U2 7617 leaves 19 h 05 after EC 7668 arrives on the timetable: more than half a day, so not a connection we count.