StrikeIron Address Distance API

The StrikeIron Address Distance Calculator Web Service instantly calculates the distance between two addresses in both the U.S. and Canada. The distance is calculated as the straight line distance between two points. Simply provide information for two different addresses and it will calculate the distance between the two points. Note, this is a straight-line distance between the centroid of the ZIP+4 or Postal Code of the address, not driving distance. Data provided by DataFlux, a SAS company.