BR 646 then UA 2226 at O'Hare
Anchorage → Chicago → Buffalo
Timetable, Chicago time
17:10BR 646 from Anchorage at the gate
14:18UA 2226 to Buffalo leaves the gate
21 h 08 apart on the timetable, overnight
UA 2226 leaves 21 h 08 after BR 646 arrives on the timetable: more than half a day, so not a connection we count.