BR 646 then UA 5854 at O'Hare
Anchorage → Chicago → Lexington
Timetable, Chicago time
17:10BR 646 from Anchorage at the gate
16:30UA 5854 to Lexington leaves the gate
23 h 20 apart on the timetable, overnight
UA 5854 leaves 23 h 20 after BR 646 arrives on the timetable: more than half a day, so not a connection we count.