UA 5657 then BR 643 at O'Hare
Omaha → Chicago → Anchorage
Timetable, Chicago time
15:00UA 5657 from Omaha at the gate
14:50BR 643 to Anchorage leaves the gate
23 h 50 apart on the timetable, overnight
BR 643 leaves 23 h 50 after UA 5657 arrives on the timetable: more than half a day, so not a connection we count.