BR 646 then UA 3523 at O'Hare
Anchorage → Chicago → Richmond
Timetable, Chicago time
17:10BR 646 from Anchorage at the gate
13:55UA 3523 to Richmond leaves the gate
20 h 45 apart on the timetable, overnight
UA 3523 leaves 20 h 45 after BR 646 arrives on the timetable: more than half a day, so not a connection we count.