Complex sentence: Kennedy and Pietrafeso were friends of the owners and hung out there often, so they were driven to the Memphis airport and boarded Elvis's private jet, the Lisa Marie, and flew the two hours to Denver.
Split into simpler sentences: Kennedy and Pietrafeso were friends of the owners and hung out there often. So they were driven to the Memphis airport and boarded Elvis's private jet, the Lisa Marie, and flew the two hours to Denver.