AA 41 then UA 3876 at O'Hare
Barcelona → Chicago → Miami
Timetable, Chicago time
14:05AA 41 from Barcelona at the gate
07:00UA 3876 to Miami leaves the gate
16 h 55 apart on the timetable, overnight
UA 3876 leaves 16 h 55 after AA 41 arrives on the timetable: more than half a day, so not a connection we count.