Largest airlines in the world is considered by revenue generated, number of aircrafts owned, countries covered, etc. The slump in global oil price and appreciation of Us Dollars has turned out to be a huge gain in the industry. The airline market is now edging closer to the oil market. Check out the list : http://slick.siterubix.com/worlds-largest-airlines and see where Nigeria, the number one oil producer in Africa is. Or should Nigeria not be in the list?