UA 1730 then AM 649 at LAX
Seattle (SEA) → Los Angeles → Mexico City
Timetable, Los Angeles time
18:56UA 1730 from Seattle (SEA) at the gate
07:02AM 649 to Mexico City leaves the gate
12 h 06 apart on the timetable, overnight
AM 649 leaves 12 h 06 after UA 1730 arrives on the timetable: more than half a day, so not a connection we count.