SK 9502 then WN 2989 at San Francisco
Mexico City → San Francisco → St Louis
Timetable, San Francisco time
11:38SK 9502 from Mexico City at the gate
11:15WN 2989 to St Louis leaves the gate
23 h 37 apart on the timetable, overnight
WN 2989 leaves 23 h 37 after SK 9502 arrives on the timetable: more than half a day, so not a connection we count.