Top 10 states with the cheapest gas prices in the U.S.

Since Zutobi's, a driving education website, first U.S. Fuel Index report last summer, gas prices across the country have dramatically increased. In the summer of 2021, the average cost of gas throughout the U.S. was only $3.03 compared to now when prices have risen by 27.88 percent to $4.20. However, this is the national average, and price increases differ between states, meaning that where previously some states were more affordable or more expensive, that may no longer be the case. 

States with the cheapest gas

1. Missouri: $3.78 per gallon

Since last summer's report, Missouri has risen two places in the rankings, making them the state with the cheapest gas in the U.S. 

2. Kansas: $3.80 per gallon

Previously, the seventh most affordable state for gas, Kansas prices have only increased by $0.96 or 25.37 percent, making them the second most affordable state to buy gas.

3. Oklahoma: $3.81 per gallon 

Moving up from fifth place, Oklahoma now ranks third for cheapest gas prices, having gone up from $2.76 to $3.81, a 27.65 percent increase. 

States with the most expensive gas 

1. California: $5.91 per gallon

California remains the most expensive state to purchase gas from with a price that has risen nearly two dollars in the past year. 

2. Nevada: $5.25 per gallon

With the fourth-highest increase in prices, the average price of gas in Nevada has gone up by 31.20 percent -- over a dollar more than the national average. 

3. Hawaii: $5.16 per gallon

After swapping rankings with Nevada for the third most expensive state for gas, Hawaii is up from $3.91 in 2021 to $5.16 today.