AA 642 then UA 5411 at O'Hare
Dallas-Fort Worth → Chicago → Louisville
Timetable, Chicago time
13:10AA 642 from Dallas-Fort Worth at the gate
11:04UA 5411 to Louisville leaves the gate
21 h 54 apart on the timetable, overnight
UA 5411 leaves 21 h 54 after AA 642 arrives on the timetable: more than half a day, so not a connection we count.