B6 115 then TP 4392 at San Francisco
New York JFK → San Francisco → Boston
Timetable, San Francisco time
09:30B6 115 from New York JFK at the gatealso KQ 7280
06:00TP 4392 to Boston leaves the gate
20 h 30 apart on the timetable, overnight
TP 4392 leaves 20 h 30 after B6 115 arrives on the timetable: more than half a day, so not a connection we count.