To / From Detroit's Metro or Flint Biship Airports Ruby's Airport Transportation has been providing quality door to door service from the Port Huron Area to Detroit's Metro Airport and Flint's Bishop Airport for more than 25 years. Ruby's offers both Private Car Service or Airport Shuttle Services on a daily basis. Service Area includes Port Huron, Fort Gratiot, Lexington, Marysville, St. Clair, and other surrounding locations. Specialize in providing excellent service for individual, corporate, and group travel. See website below for rates and details.