A flag carrier is a transport company, such as an airline or shipping company, that, being locally registered in a given sovereign state, enjoys preferential rights or privileges accorded by that government for international operations.
Historically, the term was used to refer to airlines owned by the government of their home country and associated with the national identity of that country. Such an airline may also be known as a national airline or a national carrier, although this can have different legal meanings in some countries. Today, it is any international airline with a strong connection to its home country or that represents its home country internationally, regardless of whether it is government-owned.