Philadelphia is ranked the fifth most walkable large city in the U.S. with 93 buses, 15 rails, two subways and six light rail lines for getting around the city more easily. Most errands can be accomplished on foot,Â but most locals commute to work by car. Center City, the downtown region of Philadepia, is the most walkable area. However, more than 70% of locals outside of Center City claim their neighborhood is walkable to restaurants and grocery stores. Philadelphia has about 1,056 grocery stores nearby and popular shopping destinations like King of Prussia Mall and The Shops at Liberty Place. Two airports serve Philadelphia. The primary airport is the Philadelphia International Airport (PHL), located about 7 miles south-southwest of Center City, and the Philadelphia Airport (PNE) in Northeast Philadelphia, which offers general aviation relief.