Gas Prices In Tennessee Have Continued To Drop, With The State Average Now At $2.93 Per Gallon, 15 Cents Lower Than A Month Ago And 48 Cents Lower Than This Time Last Year. AAA Reports That This Year’s Labor Day Gas Prices Are Likely To Be The Cheapest In Three Years, With The Current Average Just Two Cents Higher Than 2021. Tennessee Now Ranks As The Third Least Expensive State For Gas In The Country.