BR 608 then UA 5790 at O'Hare
Anchorage → Chicago → St Louis
Timetable, Chicago time
20:40BR 608 from Anchorage at the gate
13:00UA 5790 to St Louis leaves the gate
16 h 20 apart on the timetable, overnight
UA 5790 leaves 16 h 20 after BR 608 arrives on the timetable: more than half a day, so not a connection we count.