CV 251 then AA 6332 at O'Hare
Anchorage → Chicago → St Louis
Timetable, Chicago time
19:00CV 251 from Anchorage at the gate
11:15AA 6332 to St Louis leaves the gate
16 h 15 apart on the timetable, overnight
AA 6332 leaves 16 h 15 after CV 251 arrives on the timetable: more than half a day, so not a connection we count.