Arizona Weekly Gas Price Update for Week of October 19, 2026

Average gasoline prices in Arizona have fallen 8.9 cents per gallon in the last week, averaging $4.57/g today, according to GasBuddy’s survey of 2,269 stations in Arizona. Prices in Arizona are 5.9 cents per gallon lower than a month ago and stand $1.19/g higher than a year ago. The national average price of diesel has increased 5.2 cents compared to a week ago and stands at $6.300 per gallon.

According to GasBuddy price reports, the cheapest station in Arizona was priced at $3.85/g yesterday while the most expensive was $6.19/g, a difference of $2.34/g. The lowest price in the state yesterday was $3.85/g while the highest was $6.19/g, a difference of $2.34/g.

The national average price of gasoline has fallen 5.5 cents per gallon in the last week, averaging $4.24/g today. The national average is down 23.0 cents per gallon from a month ago and stands $1.26/g higher than a year ago, according to GasBuddy data compiled from more than 11 million weekly price reports covering over 150,000 gas stations across the country.

Historical gasoline prices in Arizona and the national average going back five years:
October 19, 2025: $3.38/g (U.S. Average: $2.98/g)
October 19, 2024: $3.28/g (U.S. Average: $3.15/g)
October 19, 2023: $4.24/g (U.S. Average: $3.54/g)
October 19, 2022: $4.42/g (U.S. Average: $3.84/g)
October 19, 2021: $3.35/g (U.S. Average: $3.34/g)

Neighboring areas and their current gas prices:
Las Vegas- $5.36/g, down 1.8 cents per gallon from last week’s $5.38/g.
Phoenix- $4.59/g, down 12.0 cents per gallon from last week’s $4.71/g.
Tucson- $4.36/g, down 16.2 cents per gallon from last week’s $4.53/g.

“Average gasoline prices declined in the vast majority of states over the last week, led by a combination of state fuel tax suspensions and price-cycling markets working their way back down, while diesel rose in most states, though the largest diesel decline was driven by a state tax suspension,” said Patrick De Haan, head of petroleum analysis at GasBuddy. “For now, the outlook remains tied to geopolitical developments, and some price-cycling states could see upward swings in the days ahead if oil markets firm at all. Motorists in states that benefited from tax suspensions may continue to see some insulation from broader market pressures, but the overall picture remains fluid.”

GasBuddy®, a PDI Technologies company, is North America’s trusted fuel savings platform, helping consumers fuel up for less for over 25 years. With over 100 million app downloads, GasBuddy delivers real-time prices at 150,000+ stations and tangible savings through Pay with GasBuddy+™. It is the most authoritative source of station-level fuel pricing data, updating averages 288 times daily from the broadest mix of inputs— spotter reports, direct station integrations, and transactional data.

SOURCE GasBuddy