Nearly 25-40% of an airline operating expenses are used on jet fuel. While an average air traveler may not consider technicalities like fuel requirement and consumption during a typical transatlantic flight, it makes a large portion of the ticket price passengers pay. So, how much fuel does an airliner consume during flight? Well, that depends on a multitude of factors, including aircraft’s empty weight, carried payload, efficiency of the engines, flight path, and weather conditions.