BJ 246 then LH 1300 at Frankfurt
Tunis → Frankfurt am Main → Istanbul
Timetable, Frankfurt am Main time
17:05BJ 246 from Tunis at the gate
13:00LH 1300 to Istanbul leaves the gate
19 h 55 apart on the timetable, overnight
LH 1300 leaves 19 h 55 after BJ 246 arrives on the timetable: more than half a day, so not a connection we count.