Retail gasoline prices in Texas up 2 cents April 5, 2012 at 4:13 PM CDT - Updated June 26 at 9:38 PM HOUSTON (AP) - A travel group says retail gasoline prices in Texas have gone up 2 cents this week. AAA Texas on Thursday reported the average price per gallon has reached $3.84. Prices at the gas pump also rose an average 2 cents this week across the country, hitting $3.94 per gallon. The AAA survey found that Dallas and Fort Worth have the most expensive gasoline, at $3.90 per gallon. Amarillo has the cheapest gasoline in the state, at an average $3.65 per gallon. The association says tight supplies and refinery concerns continue to raise U.S. gas prices. Issues such as tensions with Iran have also contributed to higher retail gasoline costs.