CA 7381 then UA 1905 at San Francisco
Los Angeles → San Francisco → St Louis
Timetable, San Francisco time
18:02CA 7381 from Los Angeles at the gate
12:15UA 1905 to St Louis leaves the gate
18 h 13 apart on the timetable, overnight
UA 1905 leaves 18 h 13 after CA 7381 arrives on the timetable: more than half a day, so not a connection we count.