B6 64 then B6 1187 at Boston
Key West → Boston → Los Angeles
Timetable, Boston time
16:20B6 64 from Key West at the gate
15:45B6 1187 to Los Angeles leaves the gate
23 h 25 apart on the timetable, overnight
B6 1187 leaves 23 h 25 after B6 64 arrives on the timetable: more than half a day, so not a connection we count.