The first successful low-cost carrier was Pacific Southwest Airlines

The first successful low-cost carrier was Pacific Southwest Airlines in the United States, which pioneered the concept in 1949. Often, this credit has been incorrectly given to Southwest Airlines which began service in 1971 and has been profitable every year since 1973. With the advent of aviation deregulation the model spread to Europe as well, the most notable successes being Ireland's Ryanair, which began low-fares operations in 1990, and easyJet, formed in 1995. Low cost carriers developed in Asia and Oceania from 2000 led by operators such as Malaysia's AirAsia, India's Air Deccan and Australia's Virgin Blue. The low-cost carrier model is applicable worldwide, although deregulated markets are most suited for its rapid spread. In 2006, new LCCs were announced in Saudi Arabia and Mexico.

Low-cost carriers can pose a serious threat to traditional "full service" airlines, since the high cost structure of full-service carriers can prevent them from competing effectively on price - one of the most important factors for consumers when selecting a carrier. From 2001 to 2003, when the aviation industry was rocked by terrorism, war and SARS, the large majority of traditional airlines suffered heavy losses while low-cost carriers generally stayed profitable.[citation needed]

Many carriers opted to launch their own no-frills airlines, such as KLM's Buzz, British Airways' Go, Air India's Air-India Express and United's Ted, but have found it difficult to avoid cannibalizing their core business. Exceptions to this have been bmi's bmibaby, germanwings which is controlled 49% by Lufthansa and Jetstar in Australia, fully owned by Qantas, all of which successfully operate alongside their full-service counterparts.

For holiday destinations, low cost airlines also compete with seat-only charter sales. However, the inflexibility of charters (particularly as regards length of stay) makes them unpopular with many travelers.

The entry of new nations into the European Union from Eastern Europe and moves towards compliance with EU legislation by those who have not yet joined, has led to an extension of open skies arrangements. This has led to the establishment of low-cost routes by existing and new operators such as Hungary-based Wizz Air, which took its first flight on May 19, 2004 and Slovakia-based SkyEurope, which took its first flight on February 13, 2002. From 2004 to 2007 routes have been established into Austria, Bulgaria, Croatia, Slovenia, Slovakia, Poland, Romania, Hungary, Czech Republic, Turkey and Israel. By the end of 2007, there were over 45 low-cost carriers operating almost 3,500 routes around Europe.