DL 4237 then DL 3123 at Salt Lake City
St George → Salt Lake City → San Antonio
Timetable, Salt Lake City time
10:10DL 4237 from St George at the gate
09:54DL 3123 to San Antonio leaves the gate
23 h 44 apart on the timetable, overnight
DL 3123 leaves 23 h 44 after DL 4237 arrives on the timetable: more than half a day, so not a connection we count.