Located just 10 minutes from downtown, about 3.2 million travelers pass through Louisville International Airport (SDF) each year. The airport – which has three runways and a single passenger terminal with two concourses – is also known for the massive amount of cargo that it handles. UPS's worldwide hub, known as WorldPort, is located at SDF. American Airlines, Delta Air Lines, Southwest Airlines, and United Express all operate at Louisville International Airport. Collectively, these airlines fly non-stop between Louisville and more than 20 cities throughout the United States. Passenger services at SDF include restaurants, retail stores, a bank, and electronics charging stations.