UA 600 then BR 643 at O'Hare
Omaha → Chicago → Anchorage
Timetable, Chicago time
13:15UA 600 from Omaha at the gate
11:55BR 643 to Anchorage leaves the gate
22 h 40 apart on the timetable, overnight
BR 643 leaves 22 h 40 after UA 600 arrives on the timetable: more than half a day, so not a connection we count.