Mileage-Charts.comThe mileage chart for Sicily can be downloaded here (3.9MB, updated 19th Sep 2019).
The full list of cities contained within this table can be found here: list of Sicily cities.
Sicily does not include any other tables (ie. for sub-regions).
Mileage charts are provided as Excel workbooks, and give driving distances in miles and kilometers, and travel times. As a bonus, every pair of cities within our charts have distances and travel times for both directions!