WN 4457 then B6 8353 at Boston
Nashville → Boston → New York JFK
Timetable, Boston time
13:40WN 4457 from Nashville at the gate
06:00B6 8353 to New York JFK leaves the gate
16 h 20 apart on the timetable, overnight
B6 8353 leaves 16 h 20 after WN 4457 arrives on the timetable: more than half a day, so not a connection we count.