UA 3421 then AA 3268 at Charlotte
Newark → Charlotte → Punta Cana
Timetable, Charlotte time
11:39UA 3421 from Newark at the gate
07:10AA 3268 to Punta Cana leaves the gate
19 h 31 apart on the timetable, overnight
AA 3268 leaves 19 h 31 after UA 3421 arrives on the timetable: more than half a day, so not a connection we count.