Frontier Airlines is the only commercial airline that flies out of Trenton, New Jersey, as of 2015. It offers regular nonstop service to nine cities, including Atlanta, Chicago, Tampa and Orlando, with seasonal service to Detroit and Minneapolis/Saint Paul.
Trenton-Mercer Airport is the commercial airport serving Trenton. Its airport code is TNN. Mercer County owns Trenton-Mercer Airport, and it operates as a public, civil and military airport. It also offers general and corporate aviation.
Trenton-Mercer airport has a single terminal with two gates. While Mercer County has attempted to expand TNN in the past, opposition from residents in the surrounding areas, including some across the Delaware River in Pennsylvania, was successful in preventing expansion. In January 2015, the county announced plans for building a new terminal. Before these plans proceed, the county must complete environmental impact studies. Nearby residents are also likely to protest the improvements.
Nearby Newark, New Jersey, offers travelers many more options for airlines, including American, Delta and United. Smaller airlines, including Jet Blue and Virgin, also fly out of Newark Liberty, which has an average of more than four times the number of daily flights as Trenton. Newark also offers international flights, which are not available at Trenton.