UA 5134 then AA 1292 at Denver
St George → Denver → Miami
Timetable, Denver time
10:26UA 5134 from St George at the gate
23:53AA 1292 to Miami leaves the gate
13 h 27 apart on the timetable
AA 1292 leaves 13 h 27 after UA 5134 arrives on the timetable: more than half a day, so not a connection we count.