AA 619 then UA 3910 at O'Hare
Punta Cana → Chicago → Newark
Timetable, Chicago time
19:27AA 619 from Punta Cana at the gate
07:30UA 3910 to Newark leaves the gate
12 h 03 apart on the timetable, overnight
UA 3910 leaves 12 h 03 after AA 619 arrives on the timetable: more than half a day, so not a connection we count.