U.S. gas prices are up 9 cents in just two days. AAA says regular gas is averaging about $3.88 a gallon nationwide.Diesel prices are also higher than they were before President Donald Trump declared the U.S.-Iran ceasefire over. RELATED STORY | Iran warns oil tankers to use approved routes in Strait of Hormuz or face a 'forceful response'Renewed U.S. and Iranian strikes are slowing the flow of oil through the Strait of Hormuz, pushing prices higher.Prior to the three-week ceasefire, prices jumped over $4 a gallon. One month ago, the average gallon of gas was $4.15 for regular. ...read more read less