DL 188 then DL 2891 at Atlanta
Seoul → Atlanta → Ontario
Timetable, Atlanta time
17:10DL 188 from Seoul at the gate
16:55DL 2891 to Ontario leaves the gate
23 h 45 apart on the timetable, overnight
DL 2891 leaves 23 h 45 after DL 188 arrives on the timetable: more than half a day, so not a connection we count.