Westminster Party Bus Company is the Leading Party Bus Company Westminster Party Bus Company is a leading provider of group transportation across the state of Colorado. We are here to be your go-to company for finding party bus rentals, charter buses, and limousines for groups of any size. With our large fleet and extensive vehicle selection, we can accommodate a wide variety of trips and events. Whether it's a wedding, sporting event, corporate gathering, school field trip, or private celebration, our team is ready to help you book the right ride. With fast online quotes and a professional reservations team available year-round, planning your next trip has never been easier.