Costco Gas Prices in London, ON

London, Ontario has 2 Costco fuel centers serving members in the area. Across London, regular gas averages 179.9¢, premium runs about 20.0¢ higher at 199.9¢, and diesel sits at 193.9¢. That's about 5.0¢ above the Ontario provincewide average of 174.9¢. Within London, Costco N London posts the lowest regular at 179.9¢ and S London the highest at 179.9¢ — a 0.0¢ spread worth checking before you fuel up. Across London, regular pump prices have climbed about 2.0¢ over the past week, from 177.9¢ a week ago. Diesel has eased about 3.0¢ over the same period. Diesel is available at 1 of the 2 London stations.