Ontario gas prices are set to go back up tomorrow — Here's where you can fill up for cheap

Heads up, Ontario drivers — gas prices in Ontario are set to go back up tomorrow after a quick dip today, but we've got the details on where you can still find the best deal.

If you've been keeping an eye on Ontario gas prices, you'll want to fill up soon to dodge the higher costs at the pump that are coming our way.

What's happening with Ontario gas prices?

According to Gas Wizard, starting tomorrow, September 19, gas prices are expected to rise by 2 cents per litre in major cities across Ontario. If you're in Toronto or the GTA, Barrie, Hamilton, Niagara, Waterloo or Windsor, you can expect to pay around 148.9 cents per litre for regular gas, 178.9 cents for premium and 146.9 cents for diesel.

Where will gas be cheapest?

• Kingston: Regular gas is set to rise 4 cents to 142.9 per litre, making this the cheapest spot in the province to fuel up tomorrow.
• Cornwall & Sudbury: Often the cheapest spot in Ontario, Cornwall is set to see a major rise of 7 cents per litre, bringing it up to 144.9 — neck and neck with Sudbury, which is predicted to stay unchanged from today's price.
• Peterborough & Ottawa: Prices in the usually cheap Peterborough are set to rise by 6 cents, bringing it up to Ottawa's unchanged price of 145.9.
• London & Oshawa: These two spots in southern Ontario are set to see marginal increases but still remain slightly cheaper than other cities in the region, with regular gas predicted at 147.9 cents per litre in both areas.
• Windsor: Regular gas here could see the biggest increase in the province tomorrow, rising by 8 cents to 148.9 — so if you live around here, you'd be smart to fill up today!
• Thunder Bay: Unsurprisingly, gas here remains some of the most expensive in the province, although it's set to hold steady tomorrow at 151.9 cents per litre.

Expert insights

Gas analyst Dan McTeague recently gave Narcity some insights into Ontario's fluctuating fuel prices, noting that the transition to winter-blend gasoline can affect the market in various ways.

According to AAA, winter-blend gas contains more butane, making it less expensive but also more volatile in warmer weather. Summer blend, on the other hand, performs better in the heat but comes at a higher cost.

So while prices are on the rise tomorrow, there may be an overall downward trend on its way as we make the seasonal change.

National context

According to CAA, the national average for gas prices in Canada as of Wednesday, September 18, sits at 156.2 cents per litre. This is notably lower than the year's peak of 172.4 cents per litre, which was recorded on April 19, 2024. In contrast, the lowest point in the past year was on January 11, 2024, when prices averaged 135.8 cents per litre.

The current 156.2 cents per litre is the lowest daily average seen over the past month, while the highest was 159.5 cents per litre on August 19. Keep an eye on these price shifts, as they often fluctuate based on seasonal fuel blends and changing demand.

What's next?

With prices set to rise tomorrow, your best bet is to fill up today if you're in southern or eastern Ontario — especially in Windsor, Cornwall, Peterborough or Kingston, which are set to see the biggest increases.

Remember: Prices can vary slightly by location, so always check your local gas station before filling up.

Love this? Check out our Narcity noticeboard for details on jobs, benefits, travel info and more!

AI tools may have been used to support the creation or distribution of this content; however, it has been carefully edited and fact-checked by a member of Narcity's Editorial team. For more information on our use of AI, please visit our Editorial Standards page.