BJ 246 then KL 1820 at Frankfurt
Tunis → Frankfurt am Main → Amsterdam
Timetable, Frankfurt am Main time
17:05BJ 246 from Tunis at the gate
14:15KL 1820 to Amsterdam leaves the gate
21 h 10 apart on the timetable, overnight
KL 1820 leaves 21 h 10 after BJ 246 arrives on the timetable: more than half a day, so not a connection we count.