B6 1223 then WN 1913 at LAX
New York JFK → Los Angeles → Las Vegas
Timetable, Los Angeles time
20:04B6 1223 from New York JFK at the gate
11:55WN 1913 to Las Vegas leaves the gate
15 h 51 apart on the timetable, overnight
WN 1913 leaves 15 h 51 after B6 1223 arrives on the timetable: more than half a day, so not a connection we count.