BA 248 then BA 872 at Heathrow
Buenos Aires → London → Krakow
Timetable, London time
08:20BA 248 from Buenos Aires at the gate
06:55BA 872 to Krakow leaves the gate
22 h 35 apart on the timetable, overnight
BA 872 leaves 22 h 35 after BA 248 arrives on the timetable: more than half a day, so not a connection we count.