Establishments primarily engaged in operating and maintaining airports and flying fields; in servicing, repairing (except on a factory basis), maintaining, and storing aircraft; and in furnishing coordinated handling services for airfreight or passengers at airports. This industry also includes private establishments primarily engaged in air traffic control operations. Government air traffic control operations are classified in Public Administration, Industry 9621. Aircraft modification centers and establishments primarily engaged in factory type overhaul of aircraft are classified in Manufacturing, Major Group 37, and flying fields maintained by aviation clubs are classified in Services, Industry 7997.

• Air traffic control, except government
• Aircraft cleaning and janitorial service
• Aircraft servicing and repairing, except on a factory basis
• Aircraft storage at airports
• Aircraft upholstery repair
• Airfreight handling at airports
• Airport hangar rental
• Airport leasing, if operating airport
• Airport terminal services
• Airports
• Flying fields, except those maintained by aviation clubs
• Hangar operation