AA 1584 then AA 3636 at DFW
Las Vegas → Dallas-Fort Worth → Cedar Rapids
Timetable, Dallas-Fort Worth time
15:46AA 1584 from Las Vegas at the gate
15:40AA 3636 to Cedar Rapids leaves the gate
23 h 54 apart on the timetable, overnight
AA 3636 leaves 23 h 54 after AA 1584 arrives on the timetable: more than half a day, so not a connection we count.