| Round Rock to Kalispell (Montana) | 1,504.80 mi (2,421.74 km) |
| Round Rock to Kaneohe (Hawaii) | 3,745.42 mi (6,027.68 km) |
| Round Rock to Kankakee (Illinois) | 912.63 mi (1,468.74 km) |
| Round Rock to Kannapolis (North Carolina) | 1,042.34 mi (1,677.49 km) |
| Round Rock to Kansas City (Kansas) | 616.51 mi (992.18 km) |
| Round Rock to Kansas City (Missouri) | 619.50 mi (996.99 km) |
| Round Rock to Kapaa (Hawaii) | 3,819.46 mi (6,146.82 km) |
| Round Rock to Kapolei (Hawaii) | 3,763.64 mi (6,056.99 km) |
| Round Rock to Katy (Texas) | 120.53 mi (193.97 km) |
| Round Rock to Kaukauna (Wisconsin) | 1,079.37 mi (1,737.09 km) |
| Round Rock to Kaysville (Utah) | 1,077.80 mi (1,734.54 km) |
| Round Rock to Kearney (Missouri) | 637.89 mi (1,026.58 km) |
| Round Rock to Kearney (Nebraska) | 707.44 mi (1,138.51 km) |
| Round Rock to Kearns (Utah) | 1,064.71 mi (1,713.49 km) |
| Round Rock to Kearny (New Jersey) | 1,492.22 mi (2,401.49 km) |
