GG 4954 then AA 2921 at O'Hare
Anchorage → Chicago → Buffalo
Timetable, Chicago time
20:56GG 4954 from Anchorage at the gate
14:20AA 2921 to Buffalo leaves the gate
17 h 24 apart on the timetable, overnight
AA 2921 leaves 17 h 24 after GG 4954 arrives on the timetable: more than half a day, so not a connection we count.