I am trying to book a oneway rental from San Diego Airport (SANO01) to Las Vegas (LAST01) and cannot get National.com or the phone reservations number to show availability for either free day or paid reservations for the dates I need. If I move the dates a month either way it is not an issue. Availability is present for local rentals as well as oneways to other California locations and PHX. The suburban San Diego locations (Solana Beach and Escondito) do price to Las Vegas but location and pickup hours are very inconvenient to my plans. Is there anyway to beat the system into submission without booking for location X and phoning in after pickup that I am hijacking the car to Vegas?