AI 187 then PD 651 at Toronto Pearson
New Delhi → Toronto → Las Vegas
Timetable, Toronto time
07:40AI 187 from New Delhi at the gate
07:00PD 651 to Las Vegas leaves the gate
23 h 20 apart on the timetable, overnight
PD 651 leaves 23 h 20 after AI 187 arrives on the timetable: more than half a day, so not a connection we count.