AM 644 then WN 1913 at LAX
Mexico City → Los Angeles → Las Vegas
Timetable, Los Angeles time
12:00AM 644 from Mexico City at the gate
11:55WN 1913 to Las Vegas leaves the gate
23 h 55 apart on the timetable, overnight
WN 1913 leaves 23 h 55 after AM 644 arrives on the timetable: more than half a day, so not a connection we count.