Gasoline prices around Arizona are higher at the pump this week. Officials with Triple-A Arizona said Thursday (20) that the average statewide price for unleaded regular gasoline is three-27 a gallon. That is up by more than three-cents from last week. This week's national average is at three-38 per gallon, an increase of nearly six-cents from last week. Tucson has Arizona's lowest average gasoline price at three-16 a gallon and Flagstaff has the highest at three-40. Montana has the lowest average gas prices in the continental U-S at three-eleven a gallon with California having the highest at three-74 a gallon.