UA 3501 then AA 2378 at O'Hare
Kansas City → Chicago → Dallas-Fort Worth
Timetable, Chicago time
17:05UA 3501 from Kansas City at the gate
08:29AA 2378 to Dallas-Fort Worth leaves the gate
15 h 24 apart on the timetable, overnight
AA 2378 leaves 15 h 24 after UA 3501 arrives on the timetable: more than half a day, so not a connection we count.