This U.S. industry comprises establishments primarily engaged in providing air transportation of passengers or passengers and cargo with no regular routes and regular schedules. Cross-References. Establishments primarily engaged in-- ? Providing specialty air transportation or flying services with no regular routes and regular schedules using general purpose aircraft--are classified in U.S. Industry 481219, Other Nonscheduled Air Transportation; ? Providing specialized air sightseeing services--are classified in Industry 487990, Scenic and Sightseeing Transportation, Other; ? Providing air transportation of passengers or passengers and cargo over regular routes and on regular schedules--are classified in U.S. Industry 481111, Scheduled Passenger Air Transportation; and ? Providing air transportation of cargo (without transporting passengers) with no regular routes and schedules--are classified in U.S. Industry 481212, Nonscheduled Chartered Freight Air Transportation.