Gas prices across Arizona are down again this week, but is a rise in the future? Triple-A Arizona says the average price of gas is down over two-cents this week to $2.46 a gallon. In Flagstaff, gas is also down over two cents this week on average to $2.65 a gallon. However, some stations are selling gas for $2.49 a gallon. In Prescott, gas is down nearly three-cents a gallon this week to $2.75 a gallon. Some stations are selling gas for $2.60 a gallon. Officials say crude inventories rose less than expected, so crude prices may go up, which will cause the price at the pump will go up as well.