A3 961 then A3 734 at Athens
Bucharest → Athens → Tunis
Timetable, Athens time
11:50A3 961 from Bucharest at the gate
08:00A3 734 to Tunis leaves the gate
20 h 10 apart on the timetable, overnight
A3 734 leaves 20 h 10 after A3 961 arrives on the timetable: more than half a day, so not a connection we count.