Costco Gas Prices in Spokane, WA

Spokane, Washington has 2 Costco fuel centers serving members in the area. Across Spokane, regular gas averages $5.124, premium runs about $0.55 higher at $5.674, and diesel sits at $6.469. That's about $0.24 below the Washington statewide average of $5.360. Within Spokane, Costco N Spokane posts the lowest regular at $5.099 and Spokane the highest at $5.149 — a $0.05 spread worth checking before you fuel up. Across Spokane, regular pump prices have climbed about $0.10 over the past two weeks, from $5.029 two weeks ago. Premium has climbed about $0.25 over the same period. Diesel is available at 1 of the 2 Spokane stations.