Located six miles from downtown Oklahoma City, Will Rogers World Airport (OKC) is a joint civil-military airport and the primary commercial airport in the region. In 2014 it handled about 3.8 million passengers. The airport has four runways and a single terminal with 17 gates spread across two concourses (the Central Concourse and the West Concourse). Southwest Airlines has the largest market share at OKC. Other major carriers at the airport are Alaska Airlines, Allegiant Air, American Airlines, Delta Air Lines, and United Airlines. Passengers can fly non-stop between Oklahoma City and about 25 destinations across the United States. The airport is served by taxis, limousines and shuttle services, as well as several rental car companies.