| Houston to Ridgeland (Mississippi) | 359.54 mi (578.63 km) |
| Houston to Ridgewood (New Jersey) | 1,420.45 mi (2,286.00 km) |
| Houston to Rifle (Colorado) | 972.45 mi (1,565.01 km) |
| Houston to Rincon (Georgia) | 854.91 mi (1,375.84 km) |
| Houston to Ringwood (New Jersey) | 1,416.73 mi (2,280.01 km) |
| Houston to Río Grande (Puerto Rico) | 2,015.94 mi (3,244.34 km) |
| Houston to Rio Grande City (Texas) | 314.84 mi (506.68 km) |
| Houston to Rio Linda (California) | 1,603.13 mi (2,579.99 km) |
| Houston to Rio Rancho (New Mexico) | 759.81 mi (1,222.80 km) |
| Houston to Rio Rico (Arizona) | 934.05 mi (1,503.20 km) |
| Houston to Ripon (California) | 1,571.24 mi (2,528.66 km) |
| Houston to River Edge (New Jersey) | 1,422.24 mi (2,288.87 km) |
| Houston to River Falls (Wisconsin) | 1,052.41 mi (1,693.69 km) |
| Houston to River Forest (Illinois) | 936.97 mi (1,507.90 km) |
| Houston to River Grove (Illinois) | 938.27 mi (1,510.00 km) |
