BA 194 then BA 370 at Heathrow
Houston → London → Toulouse
Timetable, London time
06:50BA 194 from Houston at the gate
06:25BA 370 to Toulouse leaves the gate
23 h 35 apart on the timetable, overnight
BA 370 leaves 23 h 35 after BA 194 arrives on the timetable: more than half a day, so not a connection we count.