A Welcome Christmas Surprise As Gasoline Will Be Cheap. AAA Estimates The 107.3 Million Americans Will Take Planes, Trains, And Automobiles Between December 23rd And New Year’s Day. The Price Of Regular Grade Gas In Northeast Tennessee Is Averaging $2.23 Per Gallon This Week. Stephanie Milani With AAA Said Prices Will Continue To Decrease, Falling Somewhere Near Last Year’s Average Of $2.07.