One argument is that positive externalities, similar to higher progress as a result of world mobility, outweigh the microeconomic losses and justify continuing government intervention. Although many countries continue to operate state-owned or parastatal airlines, many large airlines at present are privately owned and are due to this fact ruled by microeconomic principles to maximise shareholder revenue. Historically, air journey has survived largely via state support, whether within the type of equity or subsidies. The airline business as an entire has made a cumulative loss throughout its one hundred-yr historical past.

By the mid-Twenties, the Postal Service had developed its personal air mail network, primarily based on a transcontinental spine between New York City and San Francisco...