Colorado vs Utah gas prices
Regular gas is $0.12 a gallon cheaper in Colorado — $1.85 on a 15-gallon fill-up. The two share a border, so that gap is worth knowing before you cross it.
Utah| Grade | CO | UT | Diff. | |
|---|---|---|---|---|
| Regular | $4.13 | $4.25 | $0.12CO | Colorado |
| Midgrade | $4.54 | $4.54 | $0.00CO | Colorado |
| Premium | $4.87 | $4.80 | $0.08UT | Utah |
| Diesel | $5.18 | $5.28 | $0.10CO | Colorado |
Where the $0.12 gap actually comes from
65% of it is tax. Utah charges $0.08 more per gallon in federal and state taxes than Colorado. The remaining $0.04 is a real difference in what the fuel, refining and distribution cost — refinery proximity, pipeline access and state fuel-blend rules.
Fuel, refining, distribution and marginFederal and state taxes Pre-tax figures are estimates — see the note below.
What the gap is worth
Based on today’s $0.12 per-gallon difference, which moves week to week. Use the fuel cost calculator for your own mileage and vehicle.
Prices by metro area
State averages hide a lot. These are the cheapest metros AAA reports on each side.
Other comparisons
Frequently asked questions
Is gas cheaper in Colorado or Utah?
Regular gas is cheaper in Colorado, at $4.13 a gallon against $4.25 in Utah — a gap of $0.12, or 3.0%. On a 15-gallon fill-up that is $1.85. Figures are AAA daily state averages for 2026-08-02.
Why is gas more expensive in Utah?
65% of the $0.12 gap is tax rather than the cost of the fuel. Utah levies $0.08 more per gallon in federal and state taxes; the remaining $0.04 is a genuine difference in what the fuel, refining and distribution cost.
Is diesel cheaper in Colorado or Utah?
Diesel is cheaper in Colorado at $5.18 a gallon, against $5.28 in Utah — $0.10 a gallon apart.
Is it worth crossing from Utah into Colorado to fill up?
If you are already near the line, yes: a 15-gallon fill saves about $1.85. Driving out of your way for it rarely pays — at $4.25 a gallon and 25 mpg, a 5-mile round trip would eat the whole saving in fuel alone, before your time.