BA 222 then BA 540 at Heathrow
Nashville → London → Bologna
Timetable, London time
08:50BA 222 from Nashville at the gate
07:25BA 540 to Bologna leaves the gate
22 h 35 apart on the timetable, overnight
BA 540 leaves 22 h 35 after BA 222 arrives on the timetable: more than half a day, so not a connection we count.