Which federal agency is primarily involved in the scheduling of air traffic?

The Federal Aviation Administration (FAA) is the agency primarily responsible for the regulation and oversight of civil aviation in the United States, including the scheduling and management of air traffic. The FAA establishes safety regulations, oversees air traffic control operations, and develops policies to ensure the efficient flow of air traffic in the national airspace system.

While Air Traffic Control (ATC) operates under the FAA and is directly responsible for the real-time management of aircraft in the skies, the broader authority and framework for scheduling air traffic originate from the FAA's policies and regulatory structure. The NTSB focuses on investigating aviation accidents and the CAB, which was dissolved in 1985, used to regulate some aspects of airline economics and routes but does not have a role in air traffic scheduling today. Thus, the FAA is the correct choice as it plays a central role in shaping and enforcing air traffic management practices.