Distance Between San Diego and Johnston = Miles
Calculated driving distance between San Diego, California and Johnston, Rhode Island is miles, this equals kilometres. Estimated driving time is in current traffic conditions. With an average car, this trip would cost around $ in gasoline, since you would need about gallons of fuel.(Based on current US Gas prices and average mileage of 3.6 gallons gas per mile).
Leaving from San Diego, California located in California - United States you would reach Johnston, Rhode Island (Rhode Island - United States) in about driving an average speed of miles per hour to cover the miles, assuming traffic conditions stay unchanged and you don't take any breaks.
The map overview below shows the best driving route from San Diego, California to Johnston, Rhode Island as a blue line on the map, with starting point (San Diego) marked A, and destination point (Johnston) marked B. You can zoom in on the map to view road numbers, street names and other details both in San Diego, California and Johnston, Rhode Island as well as every other town near or on your route.