| Round Rock to Des Plaines (Illinois) | 961.79 mi (1,547.84 km) |
| Round Rock to Desert Hot Springs (California) | 1,126.65 mi (1,813.17 km) |
| Round Rock to DeSoto (Texas) | 150.74 mi (242.59 km) |
| Round Rock to Destin (Florida) | 666.47 mi (1,072.58 km) |
| Round Rock to Destrehan (Louisiana) | 437.19 mi (703.58 km) |
| Round Rock to Detroit (Michigan) | 1,148.27 mi (1,847.97 km) |
| Round Rock to Diamond Bar (California) | 1,199.48 mi (1,930.38 km) |
| Round Rock to Diamond Springs (California) | 1,428.36 mi (2,298.72 km) |
| Round Rock to Dickinson (North Dakota) | 1,163.35 mi (1,872.23 km) |
| Round Rock to Dickinson (Texas) | 172.60 mi (277.78 km) |
| Round Rock to Dickson (Tennessee) | 706.47 mi (1,136.96 km) |
| Round Rock to Difficult Run (Virginia) | 1,286.84 mi (2,070.97 km) |
| Round Rock to Dinuba (California) | 1,315.53 mi (2,117.13 km) |
| Round Rock to Discovery Bay (California) | 1,454.35 mi (2,340.55 km) |
| Round Rock to Dix Hills (New York) | 1,531.83 mi (2,465.24 km) |
