OnStar Limousine is a Seattle based company that is known for professionalism, safety, comfort and class. We are a premier stretch limo and car service with a fleet of late model vehicles including the super stretch Cadillac Escalade, Chrysler Limousine, and Hummer Limos. We have been providing Sedan and Stretch Limousine transportation within Washington for over 10 years. Our specialty is Luxury Stretch Limousine service for proms, weddings, graduations, nights out in Seattle and trips to the casinos. We have Stretches that seat anywhere from 6 passengers all the way to Party Buses that seat 20.