UA 124 then A3 734 at Athens
Newark → Athens → Tunis
Timetable, Athens time
10:05UA 124 from Newark at the gate
08:00A3 734 to Tunis leaves the gate
21 h 55 apart on the timetable, overnight
A3 734 leaves 21 h 55 after UA 124 arrives on the timetable: more than half a day, so not a connection we count.