AA 9928 then UA 769 at O'Hare
New York LaGuardia → Chicago → Barcelona
Timetable, Chicago time
06:45AA 9928 from New York LaGuardia at the gate
21:50UA 769 to Barcelona leaves the gate
15 h 05 apart on the timetable
UA 769 leaves 15 h 05 after AA 9928 arrives on the timetable: more than half a day, so not a connection we count.