B6 616 then AA 4599 at JFK
San Francisco → New York → Nashville
Timetable, New York time
08:30B6 616 from San Francisco at the gate
08:29AA 4599 to Nashville leaves the gate
23 h 59 apart on the timetable, overnight
AA 4599 leaves 23 h 59 after B6 616 arrives on the timetable: more than half a day, so not a connection we count.