B6 1487 then CI 5153 at LAX
Boston → Los Angeles → Tokyo Narita
Timetable, Los Angeles time
13:27B6 1487 from Boston at the gate
12:35CI 5153 to Tokyo Narita leaves the gate
23 h 08 apart on the timetable, overnight
CI 5153 leaves 23 h 08 after B6 1487 arrives on the timetable: more than half a day, so not a connection we count.