AC 8696 then B6 1187 at Boston
Toronto Pearson → Boston → Los Angeles
Timetable, Boston time
17:58AC 8696 from Toronto Pearson at the gate
15:45B6 1187 to Los Angeles leaves the gate
21 h 47 apart on the timetable, overnight
B6 1187 leaves 21 h 47 after AC 8696 arrives on the timetable: more than half a day, so not a connection we count.