| Houston to Rockville (Maryland) | 1,218.04 mi (1,960.24 km) |
| Houston to Rockville Centre (New York) | 1,433.38 mi (2,306.80 km) |
| Houston to Rockwall (Texas) | 225.00 mi (362.10 km) |
| Houston to Rocky Mount (North Carolina) | 1,104.06 mi (1,776.81 km) |
| Houston to Rocky Point (New York) | 1,474.56 mi (2,373.08 km) |
| Houston to Rocky River (Ohio) | 1,106.16 mi (1,780.19 km) |
| Houston to Roessleville (New York) | 1,490.45 mi (2,398.66 km) |
| Houston to Rogers (Arkansas) | 456.87 mi (735.26 km) |
| Houston to Rogers (Minnesota) | 1,068.61 mi (1,719.77 km) |
| Houston to Rohnert Park (California) | 1,663.54 mi (2,677.21 km) |
| Houston to Rolla (Missouri) | 600.84 mi (966.95 km) |
| Houston to Rolling Meadows (Illinois) | 942.79 mi (1,517.28 km) |
| Houston to Roma (Texas) | 320.60 mi (515.95 km) |
| Houston to Rome (Georgia) | 672.54 mi (1,082.35 km) |
| Houston to Rome (New York) | 1,436.74 mi (2,312.21 km) |
