CV 12 then UA 4416 at O'Hare
Anchorage → Chicago → St Louis
Timetable, Chicago time
19:11CV 12 from Anchorage at the gate
15:30UA 4416 to St Louis leaves the gate
20 h 19 apart on the timetable, overnight
UA 4416 leaves 20 h 19 after CV 12 arrives on the timetable: more than half a day, so not a connection we count.