B6 297 then B6 615 at JFK
Basseterre → New York → San Francisco
Timetable, New York time
18:31B6 297 from Basseterre at the gate
17:55B6 615 to San Francisco leaves the gate
23 h 24 apart on the timetable, overnight
B6 615 leaves 23 h 24 after B6 297 arrives on the timetable: more than half a day, so not a connection we count.