A3 629 then A3 674 at Athens
Luxembourg → Athens → Florence
Timetable, Athens time
21:55A3 629 from Luxembourg at the gate
16:35A3 674 to Florence leaves the gate
18 h 40 apart on the timetable, overnight
A3 674 leaves 18 h 40 after A3 629 arrives on the timetable: more than half a day, so not a connection we count.