Costco Gas Prices in Spokane, WA

Spokane, Washington has 2 Costco fuel centers serving members in the area. Across Spokane, regular gas averages $4.249, premium runs about $0.55 higher at $4.799, and diesel sits at $5.459. That's about $0.33 below the Washington statewide average of $4.580. Within Spokane, Costco N Spokane posts the lowest regular at $4.249 and Spokane the highest at $4.249 — a $0.00 spread worth checking before you fuel up. Across Spokane, regular pump prices have eased about $0.75 over the past month, from $4.999 a month ago. Premium has eased about $0.68 and diesel has eased about $0.70 over the same period. Diesel is available at 1 of the 2 Spokane stations.