Costco Gas Prices in Arizona
- Regular avg
- $4.083▲ +$0.008
- Premium avg
- $4.705▼ −$0.016
- Diesel avg
- $6.179▲ +$0.045
- Stations reporting
- 20
Avg of 20 stations · per gallon · ▲▼ change since the previous day
Average price history in Arizona
Last 30 days · per gallonRegular: $4.526 on Oct 2 to $4.083 on Oct 31, low $4.074, high $4.539. Premium: $5.182 on Oct 2 to $4.705 on Oct 31, low $4.705, high $5.192. Diesel: $6.199 on Oct 2 to $6.179 on Oct 31, low $6.099, high $6.199.
Costco gas in Arizona today
Costco gas stations in Arizona include 20 warehouses across 13 cities.
Today’s Regular prices span $0.600 across the 20 stations reporting, from the cheapest to the most expensive.
2 stations are tied at today’s lowest price.
Costco Regular prices in Arizona have eased about $0.456 over the past month, from $4.538 a month ago.
The furthest any single station moved was SE Gilbert, down $0.690.
- Cheapest today
- NW Tucson — $3.799
- Most expensive today
- Prescott — $4.399
- vs the US average
- $0.193 below, at $4.275
- Diesel
- sold at 2 of 20 stations
- Car wash
- Scottsdale, Glendale
- Weekday opening
- 6 a.m. at all 20 stations
- Newest warehouse
- Buckeye — July 2023
- Oldest warehouse
- Surprise — November 1978
Arizona stations by price
Cheapest first — page through to see more.
| Rank | Station | Location | Regular today |
|---|---|---|---|
| 1 | NW TucsonTucson | Tucson | $3.799 |
| 2 | SW TucsonTucson | Tucson | $3.799 |
| 3 | TucsonTucson | Tucson | $3.929 |
| 4 | SurpriseSurprise | Surprise | $3.999 |
| 5 | Phoenix Business CenterPhoenix | Phoenix | $3.999 |
| 6 | AvondaleAvondale | Avondale | $3.999 |
| 7 | BuckeyeBuckeye | Buckeye | $3.999 |
| 8 | MesaMesa | Mesa | $4.049 |
| 9 | Queen CreekQueen Creek | Queen Creek | $4.049 |
| 10 | SE GilbertGilbert | Gilbert | $4.059 |
| 11 | ScottsdaleScottsdale | Scottsdale | $4.099 |
| 12 | GilbertGilbert | Gilbert | $4.159 |
| 13 | GlendaleGlendale | Glendale | $4.159 |
| 14 | Paradise ValleyPhoenix | Phoenix | $4.159 |
| 15 | TempeTempe | Tempe | $4.199 |
| 16 | Thomas RoadPhoenix | Phoenix | $4.199 |
| 17 | N PhoenixPhoenix | Phoenix | $4.199 |
| 18 | Cave CreekPhoenix | Phoenix | $4.199 |
| 19 | ChandlerChandler | Chandler | $4.199 |
| 20 | PrescottPrescott | Prescott | $4.399 |
Fuel grades at Costco in Arizona
All 20 Costco gas stations in Arizona sell Kirkland Signature fuel, which is Top Tier certified. Diesel is sold at 2 of the 20.
| Grade | Stations | Avg today | Cheapest |
|---|---|---|---|
| Regular | 20 | $4.083 | NW Tucson $3.799 |
| Premium | 20 | $4.705 | Avondale $4.489 |
| Diesel | 2 | $6.179 | N Phoenix $5.999 |
Regular
all 20 stations87-octane Kirkland Signature unleaded, the grade most cars are built for.
- Same TOP TIER detergent package as premium. The only difference between the two is octane.
- Can contain up to 10% ethanol, like most US gasoline. The pump label shows the blend.
Premium
all 20 stationsKirkland Signature premium: 91 octane at most stations, 93 in some regions.
- Only needed if your owner’s manual requires or recommends premium. Higher octane resists engine knock; it adds nothing to an engine built for regular.
- Carries the same detergent additives as regular.
Diesel
2 of 20 stationsKirkland Signature diesel, ultra-low-sulfur like all on-road diesel in the US.
- Costco says its diesel additives clean deposits from fuel injectors, keep new ones from forming and help reduce engine wear.
Not sold at Costco
- Mid-grade (89): Costco pumps offer regular and premium only.
- Cash sales: every Costco pump is card-only.
Is Costco gas in Arizona good quality?
Costco does not sell a refiner’s brand. Every pump in Arizona dispenses Costco’s own Kirkland Signature fuel, bought from major refiners and distributors in the region and finished with Costco’s additive package.
Kirkland Signature gasoline is licensed TOP TIER, the detergent standard set by automakers including GM, Ford, Toyota, Honda and BMW. Costco puts its detergent level at about five times the EPA minimum, which is what keeps intake valves and fuel injectors clear of carbon deposits. Costco’s gasoline also contains friction modifiers that it says reduce engine wear.
In short, the low price is not a lower grade. The saving comes from Costco running its gas as a membership perk on thin margins, not from the fuel.
Costco gas station hours in Arizona
On weekdays the earliest pumps in Arizona come on at 6 a.m. (Avondale) and the last ones switch off at 10 p.m. (Avondale). Pump hours run longer than the warehouse's, and weekends are shorter. Times are local.
| Station | Mon–Fri | Sat | Sun |
|---|---|---|---|
| Avondale | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
| Buckeye | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
| Cave Creek | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
| Chandler | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
| Gilbert | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
| Glendale | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
| Mesa | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
| N Phoenix | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
| NW Tucson | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
| Paradise Valley | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
| Phoenix Business Center | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
| Prescott | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
| Queen Creek | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
| Scottsdale | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
| SE Gilbert | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6:30 a.m. – 7:30 p.m. |
| Surprise | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
| SW Tucson | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
| Tempe | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
| Thomas Road | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
| Tucson | 6 a.m. – 10 p.m. | 6 a.m. – 8:30 p.m. | 6 a.m. – 7:30 p.m. |
What else is at Costco warehouses in Arizona
Every Costco gas station sits in a warehouse parking lot, so a fill-up can share a trip with the rest of the list. 2 warehouses in Arizona also have a car wash.
- Food court
- 19 of 20
- Pharmacy
- 19 of 20
- Optical
- 19 of 20
- Tire center
- 19 of 20
- Car wash
- 2 of 20
- EV charging
- 0 of 20
Car wash: Scottsdale, Glendale.
How Costco gas works in Arizona
Bring your card. The pump asks for an active Costco membership card before it starts, at all 20 gas stations in Arizona. Without a membership, a Costco Shop Card loaded with credit works the same way.
Pay by card. The pumps take Visa, most debit cards and the Costco Shop Card. There is no cash, and a card hold of up to $150 can show until the fill posts.
Check the price first. Each station sets its own price, usually once a day, so two Costco stations in Arizona can differ. Today the regular average here is $4.083. The prices on this page are collected once daily and can lag a same-day change at the pump.
Go early or late. Lines are longest on weekend afternoons and weekday evenings. The first pumps here open at 6 a.m. on weekdays.
Arizona prices by city
- Avondale · 1 station$3.999
- Buckeye · 1 station$3.999
- Chandler · 1 station$4.199
- Gilbert · 2 stations$4.109
- Glendale · 1 station$4.159
- Mesa · 1 station$4.049
- Phoenix · 5 stations$4.151
- Prescott · 1 station$4.399
- Queen Creek · 1 station$4.049
- Scottsdale · 1 station$4.099
- Surprise · 1 station$3.999
- Tempe · 1 station$4.199
- Tucson · 3 stations$3.842
States near Arizona
- Costco gas prices New Mexico · 3 stations$3.712
- Costco gas prices Nevada · 9 stations$4.752
- Costco gas prices California · 129 stations$5.453
- Costco gas prices Utah · 16 stations$4.283
- Costco gas prices Colorado · 15 stations$3.835
- Costco gas prices Idaho · 7 stations$4.220
Costco gas in Arizona: common questions
Where is the cheapest Costco gas in Arizona today?
NW Tucson posts the lowest Regular price in Arizona, $3.799 as of the October 31, 2026 reading — $0.600 under Prescott, the most expensive of the 20 stations reporting. It shares that price with 1 other station.
How many Costco gas stations are there in Arizona?
Arizona has 20 Costco warehouses with a gas station, across 13 cities, and all of them reported a price in the last 30 days.
Which Costco gas stations in Arizona sell diesel?
Diesel is sold at 2 of 20 stations in Arizona. Each station page lists the grades that warehouse has actually posted a price for in the last 30 days.
Is Costco gas cheaper in Arizona than in the US?
Yes — the average Costco Regular price in Arizona is $4.083, $0.193 below the US average of $4.275 as of the October 31, 2026 reading.
Are Costco gas prices in Arizona going up or down?
Down — the average Costco Regular price in Arizona has eased about $0.456 over the past month, from $4.538 to $4.083.
What time do Costco gas stations in Arizona open?
The pumps open at 6 a.m. on weekdays at all 20 stations, ahead of the warehouse doors. Each station page carries its own full week, in local time.