DL 1867 then UA 609 at Atlanta
St. George → Atlanta → Denver
Timetable, Atlanta time
19:50DL 1867 from St. George at the gate
16:39UA 609 to Denver leaves the gate
20 h 49 apart on the timetable, overnight
UA 609 leaves 20 h 49 after DL 1867 arrives on the timetable: more than half a day, so not a connection we count.