DL 4907 then UA 3376 at O'Hare
New York JFK → Chicago → St Louis
Timetable, Chicago time
17:20DL 4907 from New York JFK at the gate
11:00UA 3376 to St Louis leaves the gate
17 h 40 apart on the timetable, overnight
UA 3376 leaves 17 h 40 after DL 4907 arrives on the timetable: more than half a day, so not a connection we count.