AA 2473 then CI 5153 at LAX
Boston → Los Angeles → Tokyo Narita
Timetable, Los Angeles time
14:17AA 2473 from Boston at the gate
12:35CI 5153 to Tokyo Narita leaves the gate
22 h 18 apart on the timetable, overnight
CI 5153 leaves 22 h 18 after AA 2473 arrives on the timetable: more than half a day, so not a connection we count.