DL 1586 then UA 377 at Denver
Salt Lake City → Denver → Chicago O'Hare
Timetable, Denver time
20:29DL 1586 from Salt Lake City at the gate
20:25UA 377 to Chicago O'Hare leaves the gate
23 h 56 apart on the timetable, overnight
UA 377 leaves 23 h 56 after DL 1586 arrives on the timetable: more than half a day, so not a connection we count.