F9 3453 then DL 8771 at Atlanta
New York LaGuardia → Atlanta → San Francisco
Timetable, Atlanta time
20:27F9 3453 from New York LaGuardia at the gate
13:46DL 8771 to San Francisco leaves the gate
17 h 19 apart on the timetable, overnight
DL 8771 leaves 17 h 19 after F9 3453 arrives on the timetable: more than half a day, so not a connection we count.