COLUMBIA, S.C. (WOLO)– Gas prices continue to inch up after President Donald Trump declared the ceasefire agreement with Iran “over.” AAA reports the average price for a gallon of regular gas in South Carolina is $3.69 a gallon which is up a couple of cents from Thurs, July 17. And Thursday the national average for diesel was back up to about $5 a gallon. Oil and gas prices had been declining after the United States and Iran signed a peace plan to end the war in June. Categories: Local News, News, Politics, State Tags: Columbia gas prices, gas price, Gas Prices, Iran, Iran Missile Attack, Iran Missile Strikes, Iran War, national gas prices, Oil Prices, SC gas prices, South Carolina gas prices ...read more read less