CX 80 then AA 772 at O'Hare
Anchorage → Chicago → St Louis
Timetable, Chicago time
19:15CX 80 from Anchorage at the gate
18:20AA 772 to St Louis leaves the gate
23 h 05 apart on the timetable, overnight
AA 772 leaves 23 h 05 after CX 80 arrives on the timetable: more than half a day, so not a connection we count.