Gas prices are drifting lower nationwide. See today’s state-by-state averages, including the cheapest and most expensive states, plus tips to save at the pump.

Twenty states boast average gas prices below $3 per gallon, AAA data shows. Gas prices are hovering near their lowest summer level in four years as millions of people ready themselves to hit the roads ...

Oklahoma, the state with the lowest prices, offers gas at $2.50 a gallon. Gas prices stand close to their lowest level in four years as tens of millions of people prepare to travel over the ...