UA 3912 then UA 313 at Houston
San Francisco → Houston → West Palm Beach
Timetable, Houston time
04:48UA 3912 from San Francisco at the gate
18:25UA 313 to West Palm Beach leaves the gate
13 h 37 apart on the timetable
UA 313 leaves 13 h 37 after UA 3912 arrives on the timetable: more than half a day, so not a connection we count.