BA 1499 then BA 195 at Heathrow
Glasgow → London → Houston
Timetable, London time
09:50BA 1499 from Glasgow at the gate
09:35BA 195 to Houston leaves the gate
23 h 45 apart on the timetable, overnight
BA 195 leaves 23 h 45 after BA 1499 arrives on the timetable: more than half a day, so not a connection we count.