LH 891 then BJ 247 at Frankfurt
Riga → Frankfurt am Main → Tunis
Timetable, Frankfurt am Main time
16:05LH 891 from Riga at the gate
11:30BJ 247 to Tunis leaves the gate
19 h 25 apart on the timetable, overnight
BJ 247 leaves 19 h 25 after LH 891 arrives on the timetable: more than half a day, so not a connection we count.