| Round Rock to Elyria (Ohio) | 1,145.29 mi (1,843.16 km) |
| Round Rock to Emeryville (California) | 1,490.21 mi (2,398.26 km) |
| Round Rock to Emmaus (Pennsylvania) | 1,419.51 mi (2,284.48 km) |
| Round Rock to Emporia (Kansas) | 550.55 mi (886.03 km) |
| Round Rock to Encinitas (California) | 1,162.28 mi (1,870.51 km) |
| Round Rock to Endicott (New York) | 1,437.51 mi (2,313.45 km) |
| Round Rock to Endwell (New York) | 1,440.07 mi (2,317.57 km) |
| Round Rock to Englewood (Colorado) | 753.53 mi (1,212.70 km) |
| Round Rock to Englewood (Florida) | 958.62 mi (1,542.74 km) |
| Round Rock to Englewood (New Jersey) | 1,502.80 mi (2,418.52 km) |
| Round Rock to Englewood (Ohio) | 990.45 mi (1,593.98 km) |
| Round Rock to Enid (Oklahoma) | 406.39 mi (654.03 km) |
| Round Rock to Ennis (Texas) | 138.29 mi (222.55 km) |
| Round Rock to Ensley (Florida) | 618.21 mi (994.92 km) |
| Round Rock to Enterprise (Alabama) | 702.28 mi (1,130.22 km) |
