Which category of airlines generates more than $1 billion in annual revenue?

Major airlines are characterized by their robust operational scale and extensive route networks, which allow them to generate more than $1 billion in annual revenue. These airlines typically operate large fleets of aircraft and provide services to both domestic and international markets. They benefit from economies of scale, which helps them reduce costs and optimize their revenue potential through higher passenger volumes and cargo transport.

In contrast, national airlines, while significant, generally operate within a specific country and may have less revenue than major airlines due to more limited route networks and market access. Regional airlines, focused on short-haul services, typically serve smaller markets and connect passengers to larger major airports but do not reach the same revenue thresholds. Cargo airlines, while they can also be highly profitable, may not always meet the $1 billion threshold due to different operational focuses and business models. Thus, major airlines stand out as the primary category meeting the high revenue benchmark due to their size, market reach, and customer base.