Twenty states boast average gas prices below $3, spanning from New Mexico to Missouri to South Carolina. Mississippi, the state with the nation's lowest gas prices, offers drivers an average gallon for $2.71. More than 61 million people are expected to travel by car over the July 4 holiday, AAA forecasted.

The national average gas price is expected to be $3.15 per gallon on Fourth of July — the cheapest since 2021, according to a new GasBuddy report.