SN Brussels Airlines (SNBA) was the flag carrier of Belgium, which mainly operated from Brussels Airport. SNBA was the trading name of the Belgian airline Delta Air Transport. SNBA was a full-service airline, connecting Brussels with the rest of Europe. It also flew to Africa, continuing Sabena's extensive network there. The airline merged with Virgin Express into Brussels Airlines which started operations on 25 March 2007. The airline had its head office in Airport Building 117 in Brussels Airport, Zaventem, near Brussels.

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 the government for international operations.