BA 949 then BA 275 at Heathrow
Munich → London → Las Vegas
Timetable, London time
16:55BA 949 from Munich at the gate
16:05BA 275 to Las Vegas leaves the gate
23 h 10 apart on the timetable, overnight
BA 275 leaves 23 h 10 after BA 949 arrives on the timetable: more than half a day, so not a connection we count.