PHOENIX (AP) -- Gasoline prices around Arizona are slightly lower at the pump this week. Officials with Triple-A Arizona said Thursday that the average statewide price for unleaded regular gasoline is $3.24 a gallon. That's down by less than a penny from last week. This week's national average is at $3.27 per gallon, more than a penny lower than last week. Tucson has Arizona's lowest average gasoline price at $3.15 a gallon and Flagstaff has the highest at $3.35. Montana has the lowest average gas prices in the continental U.S. at $3.01 a gallon with Connecticut having the highest at $3.64 a gallon.