UA 1502 then BR 643 at O'Hare
Salt Lake City → Chicago → Anchorage
Timetable, Chicago time
12:27UA 1502 from Salt Lake City at the gate
11:55BR 643 to Anchorage leaves the gate
23 h 28 apart on the timetable, overnight
BR 643 leaves 23 h 28 after UA 1502 arrives on the timetable: more than half a day, so not a connection we count.