Via washingtontimes.com Gasoline prices around Arizona are at their highest level in 18 months. Officials with Triple-A Arizona said Thursday the average statewide price for unleaded regular gasoline is $2.30 per gallon. That’s up by less than a penny from last week, but nearly 7 cents higher since last month and almost 15 cents more than this time last year. This week’s national average is $2.40 per gallon, down by more than a penny from last week. Triple-A analysts say Arizona’s fuel prices have been inching higher for 11 weeks. Tucson has Arizona’s lowest average gasoline price at $2.20 a gallon with Flagstaff the highest at $2.50.