More Good News For Motorists. As Of Today, Gas Prices In Tennessee Are The Lowest In The Nation. Motorists In Kingsport, Johnson City, And Bristol Are Paying On Average $2.82 For A Gallon Of Gas. Meanwhile, Neighboring Virginia Is The Fifth Lowest State In The Nation, Averaging $2.86 This Week. The National Average Price This Week Stands At $3.07. Analysts Are Projecting That The Price Of Gas Could Keep Heading Even Lower Through The Rest Of The Year.