Prices for gasoline are volatile because of the ever shifting price for crude, which still makes up the biggest share of the gas price (45 percent, 2016 average). However, prices also vary across the United States. Often, greater costs are justified by greater expenses for transportation and distribution, also gas taxes can vary by state.

As our infographic shows, for the time being, Hawaii tops the list of the high-cost states, as it generally has a high cost of living, high gas taxes and high transportation costs. It's cheapest to fill your tank in South Carolina, according to GasBuddy.