BR 646 then UA 5783 at O'Hare
Anchorage → Chicago → Nashville
Timetable, Chicago time
17:10BR 646 from Anchorage at the gate
12:23UA 5783 to Nashville leaves the gate
19 h 13 apart on the timetable, overnight
UA 5783 leaves 19 h 13 after BR 646 arrives on the timetable: more than half a day, so not a connection we count.