CI 5234 then AA 3620 at O'Hare
Anchorage → Chicago → St Louis
Timetable, Chicago time
19:25CI 5234 from Anchorage at the gate
15:26AA 3620 to St Louis leaves the gate
20 h 01 apart on the timetable, overnight
AA 3620 leaves 20 h 01 after CI 5234 arrives on the timetable: more than half a day, so not a connection we count.