UA 2486 then DM 5421 at O'Hare
San Diego → Chicago → Punta Cana
Timetable, Chicago time
22:47UA 2486 from San Diego at the gate
11:10DM 5421 to Punta Cana leaves the gate
12 h 23 apart on the timetable, overnight
DM 5421 leaves 12 h 23 after UA 2486 arrives on the timetable: more than half a day, so not a connection we count.