Dane County Regional Airport , formerly known as Truax Field, is a joint civil-military commercial airport located five nautical miles (9 km) northeast of the central business district of Madison, the capital of Wisconsin. It has three runways and in 2011 it served over 1.5 million passengers. MSN serves American Airlines, Delta Air Lines, Frontier Airlines, and United Airlines, with Delta Air Lines being the carrier with the most flights. These airlines offer non-stop service to thirteen major hubs throughout the country - with over 94 departures and arrivals daily, and additional destinations such as Washington DC, New York City, and Orlando. Delta's Airbus 319s, 320s, and MD-90s, along with Frontier's Airbus 319s, are among the largest aircraft that can be seen at the Dane County Region