BA 1421 then BA 219 at Heathrow
Inverness → London → Denver
Timetable, London time
12:45BA 1421 from Inverness at the gate
12:10BA 219 to Denver leaves the gate
23 h 25 apart on the timetable, overnight
BA 219 leaves 23 h 25 after BA 1421 arrives on the timetable: more than half a day, so not a connection we count.