K4 811 then UA 2000 at O'Hare
Anchorage → Chicago → St Louis
Timetable, Chicago time
20:28K4 811 from Anchorage at the gate
14:12UA 2000 to St Louis leaves the gate
17 h 44 apart on the timetable, overnight
UA 2000 leaves 17 h 44 after K4 811 arrives on the timetable: more than half a day, so not a connection we count.