Centennial Party Bus Company is the Leading Party Bus Company Centennial Party Bus Company is the go-to transportation company for groups and events of all sizes across Colorado. Whether you need a compact shuttle for a small gathering or a fleet of buses for a group of thousands, our team will create a customized travel plan to fit your needs perfectly. With thousands of completed trips under our belt, you can count on Centennial Party Bus Company for comfortable, and reliable group travel, making us the most trusted transportation partner in the state.