UA 5471 then BR 643 at O'Hare
Louisville → Chicago → Anchorage
Timetable, Chicago time
14:55UA 5471 from Louisville at the gate
14:50BR 643 to Anchorage leaves the gate
23 h 55 apart on the timetable, overnight
BR 643 leaves 23 h 55 after UA 5471 arrives on the timetable: more than half a day, so not a connection we count.