Ohio’s average gas prices are dropping as travelers say goodbye to summer. The average price for a gallon of gas is $3.39 in today’s survey from Auto Club AAA, The Oil Price Information Service and Wex Inc. That’s down 13 cents from a week ago and 48 cents compared with this time last year. The national average Monday is a bit higher at about $3.52 per gallon, a nickel cheaper that a week ago. A year ago, that average was $3.86. The possibility of a conflict in Syria or the surrounding reason recently drove oil prices to two year highs. The price of oil fell Monday after the U.S. and Russia reached an agreement on getting Syria to give up its chemical weapons.