FI 7890 then TP 4392 at San Francisco
New York JFK → San Francisco → Boston
Timetable, San Francisco time
09:34FI 7890 from New York JFK at the gate
22:10TP 4392 to Boston leaves the gate
12 h 36 apart on the timetable
TP 4392 leaves 12 h 36 after FI 7890 arrives on the timetable: more than half a day, so not a connection we count.