Gasoline prices around Arizona are up slightly this week.

Officials with AAA Arizona said Thursday that the average statewide price for unleaded regular gasoline is $3.46 a gallon. That's up by one penny from last week.

This week's national average is $3.61 a gallon, down by 4 cents from last week.

Tucson has the lowest average gasoline price in Arizona at $3.21 a gallon, and Flagstaff has the highest at $3.68.

South Carolina has the lowest average gasoline prices in the continental U.S. at $3.21 a gallon with North Dakota having the highest at $4.08 a gallon.