AA 3038 then B6 1187 at Boston
Charlotte → Boston → Los Angeles
Timetable, Boston time
15:47AA 3038 from Charlotte at the gate
15:45B6 1187 to Los Angeles leaves the gate
23 h 58 apart on the timetable, overnight
B6 1187 leaves 23 h 58 after AA 3038 arrives on the timetable: more than half a day, so not a connection we count.