Welcome to SIXT car rental Denver Union Station. If you need to rent a car in this scenic Colorado city, your best bet is with SIXT. We offer great deals on car rentals whether you need a daily, weekly or even a long-term rental during your adventures in this fantastic city such as heading to the Denver Zoo or visiting the Downtown Aquarium. If you're looking for a cheap ride you can try one of our sporty sedans that offers reliable transportation for a solo traveler or if you have a larger group, fit them all in one of our SUVs. A Denver Union Station car rental from SIXT could not be easier, with our branch location in front of the station.