UA 3501 then AA 4997 at O'Hare
Kansas City → Chicago → South Bend
Timetable, Chicago time
17:05UA 3501 from Kansas City at the gate
11:55AA 4997 to South Bend leaves the gate
18 h 50 apart on the timetable, overnight
AA 4997 leaves 18 h 50 after UA 3501 arrives on the timetable: more than half a day, so not a connection we count.