Cost data for six U.S. airlines spanning the years from 1970 to 1984 is a significant historical dataset that offers a comprehensive view of the economic dynamics within the aviation industry during this period. This dataset typically includes details such as operating costs, capital expenditures, labor costs, fuel expenses, maintenance costs, and other financial metrics specific to each airline. Analysis of this data enables researchers, economists, and industry experts to assess cost structures, identify trends, and study the impacts of regulatory changes, fuel price fluctuations, and economic shifts on the airline industry.