| Round Rock to Darby (Pennsylvania) | 1,415.78 mi (2,278.47 km) |
| Round Rock to Dardenne Prairie (Missouri) | 691.29 mi (1,112.53 km) |
| Round Rock to Darien (Illinois) | 943.38 mi (1,518.22 km) |
| Round Rock to Davenport (Iowa) | 857.29 mi (1,379.68 km) |
| Round Rock to Davidson (North Carolina) | 1,032.45 mi (1,661.57 km) |
| Round Rock to Davie (Florida) | 1,099.52 mi (1,769.51 km) |
| Round Rock to Davis (California) | 1,472.53 mi (2,369.81 km) |
| Round Rock to Dayton (Nevada) | 1,375.13 mi (2,213.06 km) |
| Round Rock to Dayton (Ohio) | 991.59 mi (1,595.82 km) |
| Round Rock to Daytona Beach (Florida) | 995.94 mi (1,602.81 km) |
| Round Rock to De Pere (Wisconsin) | 1,093.21 mi (1,759.36 km) |
| Round Rock to De Witt (New York) | 1,466.81 mi (2,360.60 km) |
| Round Rock to Dearborn (Michigan) | 1,140.81 mi (1,835.95 km) |
| Round Rock to Dearborn Heights (Michigan) | 1,138.51 mi (1,832.25 km) |
| Round Rock to DeBary (Florida) | 986.33 mi (1,587.34 km) |
