LH 923 then DE 1668 at Frankfurt
London Heathrow → Frankfurt am Main → Heraklion
Timetable, Frankfurt am Main time
10:05LH 923 from London Heathrow at the gate
09:40DE 1668 to Heraklion leaves the gate
23 h 35 apart on the timetable, overnight
DE 1668 leaves 23 h 35 after LH 923 arrives on the timetable: more than half a day, so not a connection we count.