DL 1874 then AC 594 at Houston
Atlanta → Houston → Toronto
Timetable, Houston time
15:47DL 1874 from Atlanta at the gate
15:30AC 594 to Toronto leaves the gate
23 h 43 apart on the timetable, overnight
AC 594 leaves 23 h 43 after DL 1874 arrives on the timetable: more than half a day, so not a connection we count.