DL 974 then DL 8771 at Atlanta
New York LaGuardia → Atlanta → San Francisco
Timetable, Atlanta time
17:32DL 974 from New York LaGuardia at the gate
13:46DL 8771 to San Francisco leaves the gate
20 h 14 apart on the timetable, overnight
DL 8771 leaves 20 h 14 after DL 974 arrives on the timetable: more than half a day, so not a connection we count.