| Round Rock to Dixon (California) | 1,475.24 mi (2,374.17 km) |
| Round Rock to Dixon (Illinois) | 904.35 mi (1,455.40 km) |
| Round Rock to Dobbs Ferry (New York) | 1,510.86 mi (2,431.49 km) |
| Round Rock to Doctor Phillips (Florida) | 982.36 mi (1,580.96 km) |
| Round Rock to Dodge City (Kansas) | 517.58 mi (832.97 km) |
| Round Rock to Dolton (Illinois) | 949.46 mi (1,528.01 km) |
| Round Rock to Donna (Texas) | 303.58 mi (488.56 km) |
| Round Rock to Dorado (Puerto Rico) | 2,132.92 mi (3,432.61 km) |
| Round Rock to Doral (Florida) | 1,101.92 mi (1,773.37 km) |
| Round Rock to Doraville (Georgia) | 816.27 mi (1,313.65 km) |
| Round Rock to Dothan (Alabama) | 728.10 mi (1,171.76 km) |
| Round Rock to Douglas (Arizona) | 705.72 mi (1,135.75 km) |
| Round Rock to Douglas (Georgia) | 878.89 mi (1,414.43 km) |
| Round Rock to Douglasville (Georgia) | 789.36 mi (1,270.36 km) |
| Round Rock to Dover (Delaware) | 1,385.22 mi (2,229.29 km) |
