JL 8 then DL 508 at Boston
Tokyo → Boston → Los Angeles
Timetable, Boston time
17:25JL 8 from Tokyo at the gate
17:15DL 508 to Los Angeles leaves the gate
23 h 50 apart on the timetable, overnight
DL 508 leaves 23 h 50 after JL 8 arrives on the timetable: more than half a day, so not a connection we count.