UA 3501 then UA 1349 at O'Hare
Kansas City → Chicago → Pittsburgh
Timetable, Chicago time
17:05UA 3501 from Kansas City at the gate
14:06UA 1349 to Pittsburgh leaves the gate
21 h 01 apart on the timetable, overnight
UA 1349 leaves 21 h 01 after UA 3501 arrives on the timetable: more than half a day, so not a connection we count.