Avianca Costa Rica on 17 October 1945 by Pan American World Airways, the Costa Rican government and Costa Rican private interests. It started operations on 1 June 1946 and was designated the national carrier in 1949. Its domestic network was transferred to its wholly owned subsidiary Sansa in September 1959. LACSA operated the Douglas DC-6B four-engined piston airliner from 1960 until 1976 on their regular passenger, and eventually freight, scheduled flights to Miami International Airport. The airline introduced the first of their British Aircraft Corporation BAC One-Eleven twin-engined jet airliners onto their Caribbean passenger route network in April 1967. The airline also operated
Parks College Airline Air Lines". Ozark Air Lines had recently lost its operating certificate from the CAB and purchased the Parks airline only days into its new service to gain its certificate and routes. Ozark would eventually merge with Trans World Airlines in 1986, which in turn would merge with American Airlines in 2001. Mid-Continent would later become part of Braniff International Airways which ceased operations in 1982. The Parks College Airline fleet consisted of the following aircraft as of 1950: Parks College Airlines operated over 17 years without incident. Parks College Airline Parks College Airline was an defunct airline based in the