F9 3291 then DL 507 at LAX
Las Vegas → Los Angeles → Boston
Timetable, Los Angeles time
07:48F9 3291 from Las Vegas at the gate
20:59DL 507 to Boston leaves the gate
13 h 11 apart on the timetable
DL 507 leaves 13 h 11 after F9 3291 arrives on the timetable: more than half a day, so not a connection we count.