JL 5938 then B6 978 at San Francisco
Boston → San Francisco → Fort Lauderdale
Timetable, San Francisco time
00:25JL 5938 from Boston at the gate
13:20B6 978 to Fort Lauderdale leaves the gate
12 h 55 apart on the timetable
B6 978 leaves 12 h 55 after JL 5938 arrives on the timetable: more than half a day, so not a connection we count.