BR 646 then AA 3974 at O'Hare
Anchorage → Chicago → Harrisburg
Timetable, Chicago time
10:40BR 646 from Anchorage at the gate
08:27AA 3974 to Harrisburg leaves the gate
21 h 47 apart on the timetable, overnight
AA 3974 leaves 21 h 47 after BR 646 arrives on the timetable: more than half a day, so not a connection we count.