AA 642 then UA 4809 at O'Hare
Dallas-Fort Worth → Chicago → Wichita
Timetable, Chicago time
13:10AA 642 from Dallas-Fort Worth at the gate
08:56UA 4809 to Wichita leaves the gate
19 h 46 apart on the timetable, overnight
UA 4809 leaves 19 h 46 after AA 642 arrives on the timetable: more than half a day, so not a connection we count.