British Airways is a member of the Oneworld Alliance and is the largest carrier based on fleet size in the United Kingdom. The airline currently operates more than 250 aircraft with 50 more on order and serves the entire world. The airline has alliances with several airlines including Comair of South Africa and Sun Air of Scandinavia. The company had revenues of $14.8 billion in 2011. British Airways offers economy class, premium-economy class, business class, and first class.