UA 2447 then AC 1040 at Denver
Austin → Denver → Toronto
Timetable, Denver time
17:56UA 2447 from Austin at the gate
17:40AC 1040 to Toronto leaves the gate
23 h 44 apart on the timetable, overnight
AC 1040 leaves 23 h 44 after UA 2447 arrives on the timetable: more than half a day, so not a connection we count.