BR 646 then UA 5548 at O'Hare
Anchorage → Chicago → Nashville
Timetable, Chicago time
17:10BR 646 from Anchorage at the gate
15:49UA 5548 to Nashville leaves the gate
22 h 39 apart on the timetable, overnight
UA 5548 leaves 22 h 39 after BR 646 arrives on the timetable: more than half a day, so not a connection we count.