AA 4102 then UA 4645 at O'Hare
Denver → Chicago → Fort Wayne
Timetable, Chicago time
12:55AA 4102 from Denver at the gate
11:25UA 4645 to Fort Wayne leaves the gate
22 h 30 apart on the timetable, overnight
UA 4645 leaves 22 h 30 after AA 4102 arrives on the timetable: more than half a day, so not a connection we count.