AA 125 then UA 3018 at O'Hare
Madrid → Chicago → Newark
Timetable, Chicago time
15:05AA 125 from Madrid at the gate
07:30UA 3018 to Newark leaves the gatealso UA 3910
16 h 25 apart on the timetable, overnight
UA 3018 leaves 16 h 25 after AA 125 arrives on the timetable: more than half a day, so not a connection we count.