One of the biggest worry for airlines and their employees, is the fuel price. In the past few years, we have seen it reach well above the 100 dollars mark for a barrel. High price means huge losses and therefore forces airlines to cut expenses in order to stay operational. This diagram below, reflect the financial consequences with the barrel at different prices. Even though it is a 2008 estimate ; with the current and continuous increase of the price of crude oil, the consequences would be the same.