| Round Rock to Enterprise (Nevada) | 1,081.08 mi (1,739.83 km) |
| Round Rock to Enumclaw (Washington) | 1,730.30 mi (2,784.65 km) |
| Round Rock to Ephrata (Pennsylvania) | 1,376.95 mi (2,215.98 km) |
| Round Rock to Erie (Colorado) | 777.20 mi (1,250.78 km) |
| Round Rock to Erie (Pennsylvania) | 1,260.53 mi (2,028.62 km) |
| Round Rock to Erlanger (Kentucky) | 944.09 mi (1,519.37 km) |
| Round Rock to Escanaba (Michigan) | 1,195.94 mi (1,924.68 km) |
| Round Rock to Escondido (California) | 1,151.74 mi (1,853.55 km) |
| Round Rock to Española (New Mexico) | 615.17 mi (990.01 km) |
| Round Rock to Essex (Maryland) | 1,341.83 mi (2,159.47 km) |
| Round Rock to Essex Junction (Vermont) | 1,645.01 mi (2,647.38 km) |
| Round Rock to Estelle (Louisiana) | 454.01 mi (730.65 km) |
| Round Rock to Estero (Florida) | 1,003.50 mi (1,614.97 km) |
| Round Rock to Euclid (Ohio) | 1,178.62 mi (1,896.81 km) |
| Round Rock to Eufaula (Alabama) | 745.13 mi (1,199.18 km) |
