Gas prices today May 18: Check daily average rates in California, Texas, Florida, New York, Washington and more

The latest data from American Automobile Association (AAA) shows the US national average price for regular gasoline at $4.515 per gallon as of May 18, 2026. After a slight dip earlier in the week, prices have edged back up, signaling that the recent pause in upward movement has been short-lived.

While the day-to-day change appears modest, fuel costs remain significantly higher than many regions experienced earlier this spring. Clear regional differences continue to shape the market, with West Coast and non-contiguous states posting the highest prices, while parts of the South and Midwest remain comparatively affordable for drivers.

Gas price today in California

California continues to be the most expensive gasoline market in the United States. Regular gasoline averages $6.151 per gallon, while mid-grade stands at $6.374, premium at $6.571, and diesel reaches $7.419.

Gas price today in Texas

Texas remains among the cheapest large states for fuel. Regular gasoline averages $3.975 per gallon, with mid-grade at $4.426, premium at $4.796, and diesel at $4.996.

Gas price today in Florida

Florida’s fuel prices sit below the national average. Regular gasoline is averaging $4.213 per gallon, mid-grade $4.638, premium $4.981, and diesel $5.158.

Gas price today in New York

New York drivers continue to pay more than the national average. Regular gasoline stands at $4.606 per gallon, mid-grade at $5.087, premium at $5.489, and diesel at $5.936.

Gas price today in Washington

Washington remains one of the costliest fuel markets outside California. Regular gasoline averages $5.778 per gallon, mid-grade $6.011, premium $6.276, and diesel at $6.778.

Gas price today in Hawaii

Hawaii’s geographic isolation keeps it among the highest-priced markets nationwide. Regular gasoline averages $5.635 per gallon, mid-grade $5.902, premium $6.145, and diesel $7.117, reflecting the cost of importing fuel across long distances.

Gas price today in Oklahoma

Oklahoma stands out as one of the most affordable states for drivers. Regular gasoline averages $4.009 per gallon, mid-grade at $4.408, premium at $4.707, and diesel at $5.054, making it one of the lowest-cost markets in the country.