Over the past two decades, the development of low-cost airlines across the globe has been extensive, with the networks of budget airlines expanding rapidly across Europe (where they are much more extensive in terms of domestic networks than legacy carriers), the United States (where the world’s largest low-cost carrier, 
Southwest Airlines, is based), Asia, Australia, and South America. These budget airlines have drastically changed the nature of the travel experience, offering passengers a massive reduction in airfare in exchange for a no-frills attached experience.