CZ 435 then UA 4613 at O'Hare
Anchorage → Chicago → St Louis
Timetable, Chicago time
15:58CZ 435 from Anchorage at the gate
07:27UA 4613 to St Louis leaves the gate
15 h 29 apart on the timetable, overnight
UA 4613 leaves 15 h 29 after CZ 435 arrives on the timetable: more than half a day, so not a connection we count.