Fuel Prices in St Mary's
Live comparison for TR21 area. Tracking 1 stations across 23 brands. For a detailed breakdown including 7-day price trends, market competition analysis, and savings tips, and also find Today’s Cheapest Petrol and Diesel in St Mary's .
South West
1 Stations
1 Brands
Updated 18 Sep 2026
View St Mary's on the Fuel Map
Compare all 1 stations visually on our interactive map to find the cheapest fuel near your route.
7-Day Price Movement
Petrol (E10)
168.8p
167.6p
Diesel (B7)
190p
191.8p
All Fuel Stations in St Mary's (TR21)
Frequently Asked Questions About Fuel in St Mary's
As of 18 September 2026, the cheapest E10 petrol in St Mary's is 203.0p at Island Carriers, Porthmellon Industrial Estate, St Mary's, Isles of Scilly.
Prices are very competitive across St Mary's, with minimal variation between stations.
We update prices daily using data provided directly by fuel stations via the Competition and Markets Authority (CMA) Open Data scheme. This is a UK Government initiative requiring all major retailers to report live prices, ensuring you see the most accurate data for the Isles of Scilly area.
Not today. Island Carriers is actually cheaper than local supermarkets in TR21. It's always worth comparing before filling up.
We are currently tracking 1 active fuel stations in the TR21 area, operated by 1 different brands including Island Carriers and more.
The cheapest B7 diesel in St Mary's is currently 220.0p at Island Carriers. You can also use our interactive fuel map to compare diesel prices visually.
Nearby Locations
Prices sourced from the UK Government CMA Open Data Scheme, updated every 30 minutes. CheckFuelPrices is editorially independent — read our policy.