Avianca Costa Rica S.A., using callsign as LACSA, minority owned by the Synergy Group, is the national airline of Costa Rica and is based in San José. It operates international scheduled services to over 35 destinations in Central, North and South America. The airline previously used the TACA/LACSA moniker when it was a subsidiary of Grupo TACA. Since May 2013, following Avianca's purchase of Grupo TACA, Avianca Costa Rica became one of seven nationally branded airlines operated by Avianca Group of Latin American airlines.

A flag carrier is a transport company, such as an airline or shipping company, that, being locally registered in a given sovereign state, enjoys preferential rights or privileges accorded by the government for international operations.