Austin Straubel International Airport (airport code GRB) is located 7 miles southwest of downtown Green Bay, Wisconsin. As the 3rd largest airport in Wisconsin, Straubel is served by five airlines with direct service to seven cities, including Chicago, Illinois, Cleveland, Ohio, Detroit, Michigan and Minneapolis/St. Paul, Minnesota. Flights to Denver, Colorado, are seasonal. Connecting northeast Wisconsin and Michigan's Upper Peninsula, Straubel Airport hosts almost a half million passengers each year. Rental cars, taxis and shuttle provide transport into Green Bay. The airport has two concourses, A and B, with six gates each. On NFL game days, Green Bay Metro provides free bus service between the airport and Lambeau Field.