F9 1448 then AA 4446 at Atlanta
San Francisco → Atlanta → New York LaGuardia
Timetable, Atlanta time
06:01F9 1448 from San Francisco at the gate
06:00AA 4446 to New York LaGuardia leaves the gate
23 h 59 apart on the timetable, overnight
AA 4446 leaves 23 h 59 after F9 1448 arrives on the timetable: more than half a day, so not a connection we count.