Costco Gas Prices in Spokane, WA

Spokane, Washington has 2 Costco fuel centers serving members in the area. Across Spokane, regular gas averages $4.859, premium runs about $0.550 higher at $5.409, and diesel sits at $6.959. That's about $0.085 below the Washington statewide average of $4.944. Within Spokane, Costco N Spokane posts the lowest regular at $4.859 and Spokane the highest at $4.859 — a $0.000 spread worth checking before you fuel up. Across Spokane, regular pump prices have eased about $0.115 over the past month, from $4.974 a month ago. Premium has eased about $0.110 and diesel has eased about $0.240 over the same period. Diesel is available at 1 of the 2 Spokane stations.