BA 423 then BA 193 at Heathrow
Málaga → London → Dallas-Fort Worth
Timetable, London time
15:15BA 423 from Málaga at the gate
14:45BA 193 to Dallas-Fort Worth leaves the gate
23 h 30 apart on the timetable, overnight
BA 193 leaves 23 h 30 after BA 423 arrives on the timetable: more than half a day, so not a connection we count.