| Katy to Rosemont (California) | 1,572.69 mi (2,530.99 km) |
| Katy to Rosemount (Minnesota) | 1,044.35 mi (1,680.72 km) |
| Katy to Rosenberg (Texas) | 16.94 mi (27.26 km) |
| Katy to Roseville (California) | 1,574.85 mi (2,534.48 km) |
| Katy to Roseville (Michigan) | 1,132.95 mi (1,823.31 km) |
| Katy to Roseville (Minnesota) | 1,062.02 mi (1,709.16 km) |
| Katy to Rossmoor (California) | 1,332.49 mi (2,144.44 km) |
| Katy to Rossville (Maryland) | 1,280.33 mi (2,060.50 km) |
| Katy to Roswell (Georgia) | 734.12 mi (1,181.45 km) |
| Katy to Roswell (New Mexico) | 568.18 mi (914.39 km) |
| Katy to Round Lake (Illinois) | 967.77 mi (1,557.47 km) |
| Katy to Round Lake Beach (Illinois) | 970.53 mi (1,561.92 km) |
| Katy to Round Rock (Texas) | 120.53 mi (193.97 km) |
| Katy to Rowland Heights (California) | 1,323.08 mi (2,129.28 km) |
| Katy to Rowlett (Texas) | 219.98 mi (354.03 km) |
