DL 974 then DL 2891 at Atlanta
New York LaGuardia → Atlanta → Ontario
Timetable, Atlanta time
17:32DL 974 from New York LaGuardia at the gate
16:55DL 2891 to Ontario leaves the gate
23 h 23 apart on the timetable, overnight
DL 2891 leaves 23 h 23 after DL 974 arrives on the timetable: more than half a day, so not a connection we count.