DE 1669 then VL 1428 at Frankfurt
Heraklion → Frankfurt am Main → Sofia
Timetable, Frankfurt am Main time
17:50DE 1669 from Heraklion at the gate
14:55VL 1428 to Sofia leaves the gate
21 h 05 apart on the timetable, overnight
VL 1428 leaves 21 h 05 after DE 1669 arrives on the timetable: more than half a day, so not a connection we count.