AA 1910 then UA 5901 at O'Hare
Cancún → Chicago → Fort Wayne
Timetable, Chicago time
16:29AA 1910 from Cancún at the gate
16:10UA 5901 to Fort Wayne leaves the gate
23 h 41 apart on the timetable, overnight
UA 5901 leaves 23 h 41 after AA 1910 arrives on the timetable: more than half a day, so not a connection we count.