Gasoline prices around Arizona are slightly higher again at the pump this week. Officials with AAA Arizona say that the average statewide price for unleaded regular gasoline is $3.24 a gallon. That is an increase of almost a penny from last week. This week's national average is at $3.28 per gallon, down by nearly two-cents from last week. Tucson has Arizona's lowest average gasoline price at $3.17 a gallon and Flagstaff has the highest at $3.34. Missouri has the lowest average gas prices in the continental U.S. at $2.99 a gallon with Connecticut having the highest at $3.66 a gallon.