UA 3501 then AA 320 at O'Hare
Kansas City → Chicago → Philadelphia
Timetable, Chicago time
17:05UA 3501 from Kansas City at the gate
08:30AA 320 to Philadelphia leaves the gate
15 h 25 apart on the timetable, overnight
AA 320 leaves 15 h 25 after UA 3501 arrives on the timetable: more than half a day, so not a connection we count.