UA 1734 then AC 7070 at LAX
Washington → Los Angeles → Montréal
Timetable, Los Angeles time
11:14UA 1734 from Washington at the gate
23:35AC 7070 to Montréal leaves the gate
12 h 21 apart on the timetable
AC 7070 leaves 12 h 21 after UA 1734 arrives on the timetable: more than half a day, so not a connection we count.