The United States is home to the most major airlines as it is the largest market in the world. It is separated from the rest of the world by two oceans making long-haul routes a key factor of the American Air Carrier business model. Based on the number of passengers carried per year, the following are the largest air carriers in North America. No South American carriers make the worldwide major carriers list.
American Airlines
Delta Airlines
Southwest Airlines
Northwest Airlines
US Airways
Continental Airlines
United Airlines
Air Canada
Alaska Airlines/Horizon Air
In Europe, the financial parameters surrounding airlines are completely different. With many airlines being owned by the state, and all budget airlines selling seats for little more than the tax fees thanks to government subsidies, the potential and real profitability of European airlines is often more positive than that of major airlines in the U.S. and elsewhere.
Deutsche Lufthansa
Air France/KLM Royal Dutch Airlines
British Airways
Iberia
Ryanair
Scandinavian Airlines SAS
Easy Jet
The major Asian and Oceanic carriers are also state-owned, a fact which makes their size and reach understandable. The full strength of a sovereign government stands begin them. As a result, these flag carriers enjoy a sense of national pride among citizens. Establishing a national airlines has become one of the indicators that a developing nation has arrived on the scene.
Emirates
All Nippon Airways
Cathay Pacific
Singapore Airlines
Japan Airlines
Quantas
China Southern
Air China
Thai Airways
Korean Air
Malaysia Airlines
Saudi Airlines
With the majority of Africa and South America considered part of the developing world, no major international airlines serve significantly in these locales. Some second-tier airlines some day may make the leap into the big pool. Possibilities include South African Airways and TAM Brazil Airways. As of now the existing major carriers operate international routes to and from Africa and South America.
Beyond the major carriers, hundreds of smaller, regional and independent airlines cater to shorter and more locally significant routes around the globe. From the wildernesses of the world to inter-airport shuttles, these airlines serve a vital purpose and often shepherd passengers to and from flights operated by the world's major air carriers.