UA 4717 then AM 645 at LAX
Phoenix Sky Harbor → Los Angeles → Mexico City
Timetable, Los Angeles time
15:10UA 4717 from Phoenix Sky Harbor at the gate
13:48AM 645 to Mexico City leaves the gate
22 h 38 apart on the timetable, overnight
AM 645 leaves 22 h 38 after UA 4717 arrives on the timetable: more than half a day, so not a connection we count.