aircraft fuel our operations and financial results are significantly affected by the availability and price of jet fuel . based on our 2014 forecasted mainline and regional fuel consumption , we estimate that as of december 31 , 2013 , a $ 1 per barrel increase in the price of crude oil would increase our 2014 annual fuel expense by $ 104 million ( excluding the effect of our hedges ) , and by $ 87 million ( taking into account such hedges )