UA 5874 then BR 643 at O'Hare
Grand Rapids → Chicago → Anchorage
Timetable, Chicago time
13:59UA 5874 from Grand Rapids at the gate
11:55BR 643 to Anchorage leaves the gate
21 h 56 apart on the timetable, overnight
BR 643 leaves 21 h 56 after UA 5874 arrives on the timetable: more than half a day, so not a connection we count.