AC 8511 then PD 651 at Toronto Pearson
Philadelphia → Toronto → Las Vegas
Timetable, Toronto time
10:50AC 8511 from Philadelphia at the gate
07:00PD 651 to Las Vegas leaves the gate
20 h 10 apart on the timetable, overnight
PD 651 leaves 20 h 10 after AC 8511 arrives on the timetable: more than half a day, so not a connection we count.