UA 3501 then AA 3970 at O'Hare
Kansas City → Chicago → Wilmington
Timetable, Chicago time
17:05UA 3501 from Kansas City at the gate
08:21AA 3970 to Wilmington leaves the gate
15 h 16 apart on the timetable, overnight
AA 3970 leaves 15 h 16 after UA 3501 arrives on the timetable: more than half a day, so not a connection we count.