AA 1922 then AA 1991 at DFW
Las Vegas → Dallas-Fort Worth → Sioux Falls
Timetable, Dallas-Fort Worth time
19:06AA 1922 from Las Vegas at the gate
18:42AA 1991 to Sioux Falls leaves the gate
23 h 36 apart on the timetable, overnight
AA 1991 leaves 23 h 36 after AA 1922 arrives on the timetable: more than half a day, so not a connection we count.