AA 9928 then UA 5940 at O'Hare
New York LaGuardia → Chicago → Tucson
Timetable, Chicago time
06:45AA 9928 from New York LaGuardia at the gate
19:54UA 5940 to Tucson leaves the gate
13 h 09 apart on the timetable
UA 5940 leaves 13 h 09 after AA 9928 arrives on the timetable: more than half a day, so not a connection we count.