CV 272 then UA 5901 at O'Hare
Anchorage → Chicago → St Louis
Timetable, Chicago time
15:21CV 272 from Anchorage at the gate
15:20UA 5901 to St Louis leaves the gate
23 h 59 apart on the timetable, overnight
UA 5901 leaves 23 h 59 after CV 272 arrives on the timetable: more than half a day, so not a connection we count.