Kansas vs Oklahoma gas prices
Regular gas is $0.04 a gallon cheaper in Oklahoma — $0.65 on a 15-gallon fill-up. The two share a border, so that gap is worth knowing before you cross it.
Kansas
Oklahoma| Grade | KS | OK | Diff. | |
|---|---|---|---|---|
| Regular | $3.75 | $3.71 | $0.04OK | Oklahoma |
| Midgrade | $4.09 | $4.12 | $0.03KS | Kansas |
| Premium | $4.43 | $4.42 | $0.01OK | Oklahoma |
| Diesel | $4.86 | $4.79 | $0.08OK | Oklahoma |
Where the $0.04 gap actually comes from
All of it is tax, and then some. The fuel itself is dearer in Oklahoma before tax — by $0.01 a gallon — yet it is still $0.04 cheaper at the pump, because Kansas levies $0.05 more per gallon. Policy is doing all of the work here and overcoming a product disadvantage on the way.
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 $0.04 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 Kansas or Oklahoma?
Regular gas is cheaper in Oklahoma, at $3.71 a gallon against $3.75 in Kansas — a gap of $0.04, or 1.2%. On a 15-gallon fill-up that is $0.65. Figures are AAA daily state averages for 2026-08-02.
Why is gas more expensive in Kansas?
Entirely because of tax. Oklahoma actually pays more for the fuel itself — $0.01 a gallon more before tax — but Kansas levies $0.05 more per gallon, which more than reverses the advantage.
Is diesel cheaper in Kansas or Oklahoma?
Diesel is cheaper in Oklahoma at $4.79 a gallon, against $4.86 in Kansas — $0.08 a gallon apart.
Is it worth crossing from Kansas into Oklahoma to fill up?
If you are already near the line, yes: a 15-gallon fill saves about $0.65. Driving out of your way for it rarely pays — at $3.75 a gallon and 25 mpg, a 2-mile round trip would eat the whole saving in fuel alone, before your time.