Costco Gas Prices in London, ON

London, Ontario has 2 Costco fuel centers serving members in the area. Across London, regular gas averages 174.9¢, premium runs about 25.0¢ higher at 199.9¢, and diesel sits at 207.9¢. That's about 6.3¢ above the Ontario provincewide average of 168.6¢. Within London, Costco N London posts the lowest regular at 174.9¢ and S London the highest at 174.9¢ — a 0.0¢ spread worth checking before you fuel up. Across London, regular pump prices have climbed about 9.0¢ over the past month, from 165.9¢ a month ago. Premium has climbed about 10.0¢ and diesel has climbed about 3.0¢ over the same period. Diesel is available at 1 of the 2 London stations.