Originally Posted by
ericcheung
The oldest ones tend to stay on short east coast hops due to range limitations (newer ones have more range).
As phlwookie already mentioned, this is not true. The original LUS fleet of A321-211s are registered N161UW-N192UW. They regularly do transcons, just as the newer enhanced A321-211 and A321-231 aircraft commonly do short hops.
Not too long ago I flew on N568UW and N916US (newest -231 builds) between CLT and RDU- one of the shortest mainline routes in the system. I also flew N161UW from CLT-LAX, and N188US CLT-SFO (original -211 builds). A simple search of any LUS aircraft on flightaware will show they all move throughout the system.