Industries in the Air Transportation subsector provide air transportation of passengers and/or cargo using aircraft, such as airplanes and helicopters. The subsector distinguishes scheduled from nonscheduled air transportation. Scheduled air carriers fly regular routes on regular schedules and operate even if flights are only partially loaded. Nonscheduled carriers often operate during nonpeak time slots at busy airports. These establishments have more flexibility with respect to choice of airport, hours of operation, load factors, and similar operational characteristics. Nonscheduled carriers provide chartered air transportation of passengers, cargo, or specialty flying services. Specialty flying services establishments use general purpose aircraft to provide a variety of specialized flying services.

Scenic and sightseeing air transportation and air courier services are not included in this subsector but are included in Subsector 487, Scenic and Sightseeing Transportation and in Subsector 492, Couriers and Messengers. Although these activities may use aircraft, they are different from the activities included in air transportation. Air sightseeing does not usually involve place-to-place transportation; the passenger's flight (e.g., balloon ride, aerial sightseeing) typically starts and ends at the same location. Courier services (individual package or cargo delivery) includes more than air transportation; road transportation is usually required to deliver the cargo to the intended recipient.

This U.S. industry comprises establishments primarily engaged in providing air transportation of cargo without transporting passengers over regular routes and on regular schedules. Establishments in this industry operate flights even if partially loaded. Establishments primarily engaged in providing scheduled air transportation of mail on a contract basis are included in this industry.

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1997 Economic Census

Bridge Between NAICS and SIC

NAICS Manual Table 1

NAICS	SIC	Corresponding Index Entries
481112	4512	Air cargo carriers (except air couriers), scheduled
481112	4512	Airmail carriers, scheduled
481112	4512	Cargo carriers, air, scheduled
481112	4512	Freight carriers (except air couriers), air, scheduled
481112	4512	Helicopter freight carriers, scheduled
481112	4512	Scheduled air freight carriers
481112	4512	Scheduled air freight transportation

This U.S. industry comprises establishments primarily engaged in providing air transportation of cargo without transporting passengers with no regular routes and regular schedules.

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1997 Economic Census

Bridge Between NAICS and SIC

NAICS Manual Table 1

NAICS	SIC	Corresponding Index Entries
481212	4522	Air cargo carriers (except air couriers), nonscheduled
481212	4522	Charter air freight services
481212	4522	Freight charter services, air
481212	4522	Freight transportation, air, charter services
481212	4522	Freight transportation, air, nonscheduled
481212	4522	Helicopter carriers, freight, nonscheduled
481212	4522	Nonscheduled air freight transportation
481212	4522	Space transportation, freight, nonscheduled
481212	4522	Transportation by spacecraft, freight

This U.S. industry comprises establishments primarily engaged in providing air transportation with no regular routes and regular schedules (except nonscheduled chartered passenger and/or cargo air transportation). These establishments provide a variety of specialty air transportation or flying services based on individual customer needs using general purpose aircraft.

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1997 Economic Census

Bridge Between NAICS and SIC

NAICS Manual Table 1

NAICS	SIC	Corresponding Index Entries
481219	4522	Aircraft charter services (i.e., general purpose aircraft used for a variety of specialty air an
481219	4522	Aviation clubs providing a variety of air transportation activities to the general public