West Coast (PADD 5) vs Rocky Mountain (PADD 4) Gas Prices
Regular gasoline cost $5.057 per gallon in West Coast (PADD 5) versus $3.845 in Rocky Mountain (PADD 4) for the week of June 22, 2026 — $1.212 per gallon cheaper in Rocky Mountain (PADD 4).
Quick answer: Gas is cheaper in Rocky Mountain (PADD 4) by $1.212 per gallon — about $16.97 on a 14-gallon fill-up, or $581.76 a year at 12,000 miles and 25 mpg.
US national average for the week of June 22, 2026: $3.914 per gallon.
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West Coast (PADD 5) vs Rocky Mountain (PADD 4) gas prices: FAQ
Is gas cheaper in Rocky Mountain (PADD 4) or West Coast (PADD 5)?
Gas is cheaper in Rocky Mountain (PADD 4) at $3.845 per gallon versus $5.057 in West Coast (PADD 5) for the week of June 22, 2026 — a difference of $1.212 per gallon, or about $16.97 on a 14-gallon fill-up.
What is the gas price in West Coast (PADD 5) and Rocky Mountain (PADD 4)?
For the week of June 22, 2026, regular gasoline averaged $5.057 per gallon in West Coast (PADD 5) and $3.845 in Rocky Mountain (PADD 4), according to the U.S. Energy Information Administration (EIA) Weekly Retail Gasoline Prices.
How do these areas compare to the US average?
West Coast (PADD 5) is $1.143 per gallon above the US average and Rocky Mountain (PADD 4) is $0.069 per gallon below the US average, against the national average of $3.914 per gallon. West Coast (PADD 5) ranks 2 of 11 tracked areas by price, Rocky Mountain (PADD 4) ranks 6.
How much more does a year of driving cost in West Coast (PADD 5)?
For a car driving 12,000 miles a year at 25 mpg (about 480 gallons), the $1.212 per-gallon gap works out to roughly $581.76 more per year in West Coast (PADD 5) than in Rocky Mountain (PADD 4).
Source: U.S. Energy Information Administration (EIA), Weekly Retail Gasoline Prices, regular grade (all formulations), US dollars per gallon, taxes included — eia.gov/petroleum/gasdiesel (public domain, U.S. federal government work). the week of June 22, 2026. Annual and per-tank figures are GeraRide estimates at the stated mileage and fuel economy.