BA 873 then BA 1338 at Heathrow
Krakow → London → Newcastle
Timetable, London time
18:05BA 873 from Krakow at the gate
16:05BA 1338 to Newcastle leaves the gate
22 h apart on the timetable, overnight
BA 1338 leaves 22 h after BA 873 arrives on the timetable: more than half a day, so not a connection we count.