Southwest Airlines remained profitable by using point-to-point flying and high frequency on short haul flights with a single plane type, the Boeing 737. This allowed for low maintenance costs. Southwest also used fuel hedging through derivative instruments and real commodities like crude oil and jet fuel to hedge against price fluctuations, earning a profit of $28 million in 2014 compared to a $118 million loss in 2013. Many companies now look to emulate Southwest's low-cost business model which led to its success.