CZ 435 then AA 3111 at O'Hare
Anchorage → Chicago → St Louis
Timetable, Chicago time
15:58CZ 435 from Anchorage at the gate
09:30AA 3111 to St Louis leaves the gate
17 h 32 apart on the timetable, overnight
AA 3111 leaves 17 h 32 after CZ 435 arrives on the timetable: more than half a day, so not a connection we count.