AA 2126 then UA 5609 at O'Hare
Dallas-Fort Worth → Chicago → Appleton
Timetable, Chicago time
21:12AA 2126 from Dallas-Fort Worth at the gate
20:15UA 5609 to Appleton leaves the gate
23 h 03 apart on the timetable, overnight
UA 5609 leaves 23 h 03 after AA 2126 arrives on the timetable: more than half a day, so not a connection we count.