AA 743 then AA 9950 at Philadelphia
Barcelona → Philadelphia → Chicago O'Hare
Timetable, Philadelphia time
15:00AA 743 from Barcelona at the gate
13:01AA 9950 to Chicago O'Hare leaves the gate
22 h 01 apart on the timetable, overnight
AA 9950 leaves 22 h 01 after AA 743 arrives on the timetable: more than half a day, so not a connection we count.