DL 1492 then DL 2608 at Salt Lake City
St Louis → Salt Lake City → Idaho Falls
Timetable, Salt Lake City time
21:18DL 1492 from St Louis at the gate
20:52DL 2608 to Idaho Falls leaves the gate
23 h 34 apart on the timetable, overnight
DL 2608 leaves 23 h 34 after DL 1492 arrives on the timetable: more than half a day, so not a connection we count.