The US Department of Transportation compiles economic data from airlines regarding operating costs, with fuel being one of those key elements.  We examined our airline operating cost model and developed a comparative fuel metric, which is seat miles per gallon.   The data for our models are updated about 6 months after the close of a calendar quarter, so our current data is through the 3rd quarter of 2021.  Our models, available free to subscribers, update automatically based on the latest available data.   


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