Serving middle Tennessee, southern Kentucky and northern Alabama, the Nashville International Airport (BNA) is served by more than a dozen airlines that fly non-stop to points across the United States, Mexico and the Caribbean. In 2014, about 10.6 million travelers passed through the airport, which has a single passenger terminal with 47 gates as well as four runways. Nashville International Airport is a focus city for Southwest Airlines. Passenger services include retail shops, restaurants, coffee shops, bars, ATMs, currency exchanges, a business center, children's play areas, free WIFI internet, charging stations, a walk-in health clinic, massage chairs, a meditation room, a nail salon and USO Center. Ground transportation options include rental cars, taxis, limousines, shuttles and buses. Also available are underground transport services and rideshare services.