From 1990 to 2000, several infrastructure works were carried out with an investment of approximately $128 million. Some of these include the expansion of the two-level access road to a maximum of 10 lanes on both levels and the new air traffic control tower (designed by Segundo Cardona FAIA of SCF Architects). Competition from low-cost carriers, together with the financial crisis and oil price shock of 2008, led American to reduce its San Juan presence and consolidate its Caribbean hub operations at Miami. American eventually closed its San Juan base and retired its ATR fleet in 2013 as part of its Chapter 11 restructuring. That same year, the airport received major upgrades, including the new Terminal A, new pavement and expansions, new light systems, press conference rooms, consolidated security area for Terminals B, C and D as well as new fast food restaurants along its corridors. In 2012, the new Terminal A was opened, which is currently occupied by JetBlue Airways. The Airport is owned by the Ports Authority but since 2013 it is managed by Aerostar Airport Holdings, in a private public initiative through which a contract was granted to that company to operate the airport for 40 years. This was after observations were made by politicians in and outside of Puerto Rico, and comments were made that privatization was a better solution for the airport. Prior to privatization, management was changed each time a different political party in Puerto Rico took office and this caused disruption, and a lack of a long-term vision for the airport. In January 2024, Frontier Airlines announced the establishment of a crew base in San Juan In the past, the airport has been served by many airlines including Surinam Airways.