Montana has 5 Costco warehouses, including 2 with diesel fuel and 5 with gasoline. Use our interactive map to search by ZIP code or city, or browse the diesel station list below.
→ Search for Costco stations near you in Montana
Montana's five Costco warehouses — in Billings, Bozeman, Missoula, Helena, and Kalispell — provide members across the state with access to some of the cheapest fuel available. Costco consistently prices its gasoline 10 to 30 cents per gallon below nearby competitors, which is especially valuable in a large, sparsely populated state where driving distances are long and every cent per gallon matters. Whether you are commuting in Billings or road-tripping through Glacier National Park, Costco fuel centers offer reliable savings.
We do not list daily prices on this page because they shift with crude markets and seasonal demand. To find the Costco station nearest you, search the Montana map. If you are comparing Costco's value against premium brands, our analysis of Costco diesel vs. Shell diesel breaks down the real-world differences.
Montana is better positioned than many states for Costco diesel access, with 2 locations offering diesel fuel — Billings and Kalispell. These serve the eastern and western halves of the state respectively, covering the I-90 and US-93 corridors. For RV travelers heading to Glacier National Park or hunters and ranchers driving diesel trucks across Big Sky Country, having two Costco diesel options is a meaningful advantage.
Costco's diesel is ultra-low sulfur diesel (ULSD) that meets all EPA standards. If you are curious about whether Costco diesel is good quality, the fuel is sourced from regional refineries and includes detergent additives. Montana's cold winters make fuel quality especially important — consider pairing Costco diesel with cold-flow diesel additives to prevent gelling in sub-zero temperatures.
Costco fuel stations in Montana typically operate 6:00 AM to 10:00 PM on weekdays, with shorter weekend hours. Hours may be affected by severe winter weather, particularly in Kalispell and Bozeman. A Costco membership is required to purchase fuel, and Executive members earn 2% cash back on gas up to the annual reward cap. For more on membership options and common questions, visit our FAQ page.
Every Costco warehouse in Montana that offers diesel fuel:
| Warehouse | Address | Phone | Diesel Hours |
|---|---|---|---|
| Costco Warehouse - Billings | 3880 Zoo Drive, Billings, MT | (406) 601-8308 | See station details |
| Costco Warehouse - Kalispell | 345 Cascade Loop, Kalispell, MT | (406) 609-4924 | See station details |
Costco fuel stations consistently offer some of the lowest diesel prices in Montana. Costco members can save significantly on diesel for trucks, RVs, and commercial vehicles. Diesel at Costco is typically high-quality, additized ultra-low sulfur diesel (ULSD).