B6 387 then UA 1202 at LAX
Boston → Los Angeles → San José (Costa Rica)
Timetable, Los Angeles time
22:51B6 387 from Boston at the gate
22:42UA 1202 to San José (Costa Rica) leaves the gate
23 h 51 apart on the timetable, overnight
UA 1202 leaves 23 h 51 after B6 387 arrives on the timetable: more than half a day, so not a connection we count.