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Major Group 45: Transportation By Air

This major group includes establishments engaged in furnishing domestic and foreign transportation by air and also those operating airports and flying fields and furnishing terminal services. Establishments primarily engaged in performing services which may incidentally use airplanes (e.g., crop dusting and aerial photography) are classified according to the service performed.

Industry Group 451: Air Transportation, Scheduled, And Air Courier

Industry Group 452: Air Transportation, Nonscheduled

Industry Group 458: Airports, Flying Fields, And Airport Terminal