K4 915 then AA 3768 at O'Hare
Anchorage → Chicago → St Louis
Timetable, Chicago time
08:44K4 915 from Anchorage at the gate
20:50AA 3768 to St Louis leaves the gate
12 h 06 apart on the timetable
AA 3768 leaves 12 h 06 after K4 915 arrives on the timetable: more than half a day, so not a connection we count.