| Round Rock to Kennewick (Washington) | 1,580.99 mi (2,544.35 km) |
| Round Rock to Kenosha (Wisconsin) | 993.06 mi (1,598.17 km) |
| Round Rock to Kent (Ohio) | 1,168.09 mi (1,879.86 km) |
| Round Rock to Kent (Washington) | 1,746.10 mi (2,810.08 km) |
| Round Rock to Kentwood (Michigan) | 1,082.13 mi (1,741.51 km) |
| Round Rock to Kerman (California) | 1,354.10 mi (2,179.22 km) |
| Round Rock to Kernersville (North Carolina) | 1,083.78 mi (1,744.17 km) |
| Round Rock to Kerrville (Texas) | 93.82 mi (150.99 km) |
| Round Rock to Kettering (Maryland) | 1,314.72 mi (2,115.84 km) |
| Round Rock to Kettering (Ohio) | 990.36 mi (1,593.82 km) |
| Round Rock to Kewanee (Illinois) | 856.74 mi (1,378.79 km) |
| Round Rock to Key Biscayne (Florida) | 1,116.13 mi (1,796.24 km) |
| Round Rock to Key Largo (Florida) | 1,116.87 mi (1,797.43 km) |
| Round Rock to Key West (Florida) | 1,055.49 mi (1,698.65 km) |
| Round Rock to Keystone (Florida) | 921.66 mi (1,483.26 km) |
