American drivers are entering the peak summer travel season with some welcome relief at the pump. According to the latest data from the American Automobile Association (AAA), the national average price for a gallon of regular gasoline stands at $3.938 as of June 21, 2026.The latest figure keeps the national average below the $4-per-gallon mark and reflects a broader cooling in fuel prices across much of the United States. While gasoline remains significantly more expensive in parts of the West Coast and the Northeast, many states in the South and Midwest continue to report average prices well below the national average.Gas Price Today in CaliforniaAccording to AAA, regular gasoline in California averages $5.583 per gallon, approximately $1.65 higher than the national average. Mid-grade gasoline costs $5.810 per gallon, while premium fuel averages $5.999 per gallon. Diesel prices remain among the highest in the country at $6.784 per gallon.Gas Price Today in TexasAAA data shows regular gasoline averaging $3.438 per gallon, roughly 50 cents below the national average. Mid-grade gasoline currently averages $3.929 per gallon, while premium fuel costs $4.298 per gallon. Diesel prices stand at $4.449 per gallon statewide.Gas Price Today in FloridaFlorida motorists are paying $3.632 per gallon for regular gasoline, keeping the state comfortably below the national average.Mid-grade gasoline averages $4.082 per gallon, while premium fuel costs $4.429 per gallon. Diesel prices currently average $4.704 per gallon.Gas Price Today in New YorkAAA reports regular gasoline averaging $4.240 per gallon, around 30 cents above the national average. Mid-grade fuel currently averages $4.766 per gallon, while premium gasoline costs $5.144 per gallon. Diesel prices stand at $5.615 per gallon statewide.Gas Price Today in WashingtonRegular gasoline averages $5.362 per gallon, making Washington one of the most expensive states for fuel behind California and Hawaii. Mid-grade fuel costs $5.645 per gallon, while premium gasoline averages $5.899 per gallon. Diesel prices currently stand at $6.264 per gallon.Gas Price Today in HawaiiAccording to AAA, regular gasoline averages $5.555 per gallon, while mid-grade fuel costs $5.805 per gallon. Premium gasoline averages $6.040 per gallon, and diesel prices stand at $7.032 per gallon, the highest diesel average among all states.Gas Price Today in OklahomaAAA reports regular gasoline averaging $3.437 per gallon, nearly 50 cents below the national average. Mid-grade gasoline currently costs $3.840 per gallon, while premium fuel averages $4.149 per gallon. Diesel prices stand at $4.331 per gallon.Gas Price Today in IllinoisIllinois motorists are paying $4.194 per gallon for regular gasoline, placing the state above the national average. Mid-grade fuel averages $4.760 per gallon, premium gasoline costs $5.273 per gallon, and diesel prices stand at $5.280 per gallon.Gas Price Today in PennsylvaniaAAA data shows regular gasoline averaging $4.100 per gallon. Mid-grade gasoline currently averages $4.565 per gallon, while premium fuel costs $4.945 per gallon. Diesel prices stand at $5.514 per gallon.Gas Price Today in ArizonaArizona drivers are paying $4.207 per gallon for regular gasoline. Mid-grade fuel averages $4.558 per gallon, premium gasoline costs $4.891 per gallon, and diesel prices currently stand at $5.248 per gallon.Gas Price Today in IndianaIndiana currently reports the lowest statewide average for regular gasoline in the country at $3.341 per gallon. Mid-grade fuel averages $3.931 per gallon, premium gasoline costs $4.446 per gallon, and diesel prices stand at $5.299 per gallon.