Our Mileage-Charts.com website has free mileage charts for cities in every country and every continent except Antarctica. Mileage charts are also provided for regions and provinces (e.g. US states and UK ‘countries’) and list distance and travel time in Excel (XLSX) workbooks.
These mileage charts are computed from OpenStreetMaps data and are typically updated about once a month.
We also have a commercial pan-US zipcode chart available.