BR 646 then AA 3977 at O'Hare
Anchorage → Chicago → Detroit
Timetable, Chicago time
10:40BR 646 from Anchorage at the gate
10:30AA 3977 to Detroit leaves the gate
23 h 50 apart on the timetable, overnight
AA 3977 leaves 23 h 50 after BR 646 arrives on the timetable: more than half a day, so not a connection we count.