Costco Montana Gas Prices
Find the cheapest Costco gas in Montana— every fuel center ranked by today's price.
5 Costco fuel centers in 5 cities · 2 of 5 sell diesel
Costco operates 5 fuel centers in Montana, spread across 5 cities. Across the state, regular gas averages $3.757, premium runs about $0.53 higher at $4.285, and diesel sits at $4.144. The lowest-priced regular pump is at Costco Kalispell in Kalispell at $3.689, while Helena in Helena sits about $0.11 higher. Across the state, regular pump prices have eased about $0.47 over the past month, from $4.227 a month ago. Premium has eased about $0.52 and diesel has eased about $1.01 over the same period. Diesel is sold at 2 of the 5 Montana locations.
If your vehicle takes premium, the lowest in Montana is Costco Kalispell in Kalispell at $4.129. The cheapest diesel is at Costco Kalispell in Kalispell at $4.089. Pump prices shift from one warehouse to the next with local taxes, fuel-blend rules, and transport costs, but Costco fuel is members-only and usually runs below nearby branded stations — which is what keeps these pumps busy.
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Frequently asked questions
Which Costco has the cheapest gas in Montana?
As of the latest daily update, Costco Kalispell in Kalispell has the cheapest regular gas in Montana at $3.689 USD per gallon. Pump prices change daily, so check the ranking on this page for the current order.
How much is Costco gas in Montana right now?
Across the 5 Costco fuel centers in Montana, regular averages $3.757 USD per gallon, premium $4.285, and diesel $4.144. Those are averages of the latest pump prices — individual stations vary, so see the per-station table on this page.
Does Costco sell diesel in Montana?
Yes — 2 of the 5 Costco fuel centers in Montana sell diesel, averaging $4.144 USD per gallon. Availability varies by warehouse, so check the table above first.
Is Costco gas in Montana cheaper than average?
Montana Costco regular averages $3.757, about $0.07 lower than the national U.S. Costco average of $3.823. Wherever you fill up, Costco fuel is usually priced below nearby branded stations.
Do you need a Costco membership to buy gas in Montana?
Yes — Costco gas stations in Montana are members-only. You scan a membership card or a Costco Shop Card at the pump before fueling; non-members can't buy fuel at Costco.
How do you pay for gas at Costco in Montana?
Costco gas stations in Montana take any Visa credit card, PIN debit, a Costco Shop Card, and Apple Pay or Google Pay linked to a Visa — but not Mastercard, Amex, Discover, or cash at the pump.
What time do Costco gas stations open in Montana?
Hours vary by location, and the gas station usually opens earlier and closes later than the warehouse itself. For example, the gas station at Costco Kalispell runs 6AM – 10PM on weekdays. Check the individual station page for exact hours before a long drive.