Build into your time frame plenty of time for the whole car rental process at Las Vegas. People are corralled at the airport into long lines to await transport buses then shuttled from the airport to an off lot building that houses multiple car rental agencies. That leg took 45". BUDGET RENTAL CAR takes the prize for WORSE process all around. We reserved from Budget and paid in advance, yet we waited in line for over an hour then another 15-20 minutes to complete our "already paid for" transaction. None of the other car rental agencies had long lines. To add insult, the customer representative was rude and condescending. Over all time - 3 hours.