Original Member and FlyerTalk Evangelist
Join Date: May 1998
Location: Kansas City, MO, USA
Programs: DL PM/MM, AA ExPlat, Hyatt Glob, HH Dia, National ECE, Hertz PC
Posts: 16,579
LAS is a combined Alamao/National location, so chances of an upgrade are probably less because you just go to an aisle and pick your own car anyway.
I rented a full-size last time I was there from Alamo, and they just send you out to the full-size aisle and you get your pick of all those great Buick Century and Chevy Malibus. There was a single Dodge Intrepid and Nissan Altima on the aisle too ...