F9 2871 then DL 8771 at Atlanta
San Juan → Atlanta → San Francisco
Timetable, Atlanta time
19:17F9 2871 from San Juan at the gate
13:46DL 8771 to San Francisco leaves the gate
18 h 29 apart on the timetable, overnight
DL 8771 leaves 18 h 29 after F9 2871 arrives on the timetable: more than half a day, so not a connection we count.