| Round Rock to Delaware (Ohio) | 1,060.35 mi (1,706.47 km) |
| Round Rock to Delhi (California) | 1,403.02 mi (2,257.95 km) |
| Round Rock to Delray Beach (Florida) | 1,102.30 mi (1,773.98 km) |
| Round Rock to Deltona (Florida) | 992.59 mi (1,597.42 km) |
| Round Rock to Deming (New Mexico) | 606.70 mi (976.40 km) |
| Round Rock to Denison (Texas) | 232.67 mi (374.45 km) |
| Round Rock to Dent (Ohio) | 947.97 mi (1,525.61 km) |
| Round Rock to Denton (Texas) | 188.40 mi (303.21 km) |
| Round Rock to Dentsville (South Carolina) | 1,004.88 mi (1,617.20 km) |
| Round Rock to Denver (Colorado) | 756.43 mi (1,217.35 km) |
| Round Rock to Depew (New York) | 1,348.98 mi (2,170.97 km) |
| Round Rock to Derby (Connecticut) | 1,556.80 mi (2,505.43 km) |
| Round Rock to Derby (Kansas) | 486.30 mi (782.62 km) |
| Round Rock to Des Moines (Iowa) | 795.79 mi (1,280.71 km) |
| Round Rock to Des Moines (Washington) | 1,750.24 mi (2,816.74 km) |
