EC 7668 then A3 723 at Lisbon
Luxembourg → Lisbon → Athens
Timetable, Lisbon time
21:55EC 7668 from Luxembourg at the gate
17:15A3 723 to Athens leaves the gate
19 h 20 apart on the timetable, overnight
A3 723 leaves 19 h 20 after EC 7668 arrives on the timetable: more than half a day, so not a connection we count.