Colorado vs Kansas gas prices
Regular gas is $0.38 a gallon cheaper in Kansas — $5.64 on a 15-gallon fill-up. The two share a border, so that gap is worth knowing before you cross it.
Kansas| Grade | CO | KS | Diff. | |
|---|---|---|---|---|
| Regular | $4.13 | $3.75 | $0.38KS | Kansas |
| Midgrade | $4.54 | $4.09 | $0.44KS | Kansas |
| Premium | $4.87 | $4.43 | $0.44KS | Kansas |
| Diesel | $5.18 | $4.86 | $0.32KS | Kansas |
Where the $0.38 gap actually comes from
11% of it is tax. Colorado charges $0.04 more per gallon in federal and state taxes than Kansas. The remaining $0.34 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 $0.38 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 Kansas?
Regular gas is cheaper in Kansas, at $3.75 a gallon against $4.13 in Colorado — a gap of $0.38, or 10.0%. On a 15-gallon fill-up that is $5.64. Figures are AAA daily state averages for 2026-08-02.
Why is gas more expensive in Colorado?
11% of the $0.38 gap is tax rather than the cost of the fuel. Colorado levies $0.04 more per gallon in federal and state taxes; the remaining $0.34 is a genuine difference in what the fuel, refining and distribution cost.
Is diesel cheaper in Colorado or Kansas?
Diesel is cheaper in Kansas at $4.86 a gallon, against $5.18 in Colorado — $0.32 a gallon apart.
Is it worth crossing from Colorado into Kansas to fill up?
If you are already near the line, yes: a 15-gallon fill saves about $5.64. Driving out of your way for it rarely pays — at $4.13 a gallon and 25 mpg, a 17-mile round trip would eat the whole saving in fuel alone, before your time.