UA 348 then AC 1757 at Miami
Houston → Miami → Vancouver
Timetable, Miami time
19:55UA 348 from Houston at the gate
19:30AC 1757 to Vancouver leaves the gate
23 h 35 apart on the timetable, overnight
AC 1757 leaves 23 h 35 after UA 348 arrives on the timetable: more than half a day, so not a connection we count.