EC 7644 then FR 1791 at Lisbon
Zurich → Lisbon → Luxembourg
Timetable, Lisbon time
16:50EC 7644 from Zurich at the gatealso U2 7644
15:00FR 1791 to Luxembourg leaves the gate
22 h 10 apart on the timetable, overnight
FR 1791 leaves 22 h 10 after EC 7644 arrives on the timetable: more than half a day, so not a connection we count.