Capital Airlines Vickers Viscount at ABE Airport discharging passengers. Origionally known as Pennsylvania Central Airlines, in 1947, the PCA route network no longer reflected their name, on April 21, 1948, the airline adopted a new insignia, colors and name: Capital Airlines. The airline began service to Allentown ABE airport in 1948. In 1961 after several years of financial losses, the airline declared bankrupsy. It was purched by United Airlines. United Still serves the current Lehigh Valley International Airport.