| Maryland Heights to Ridgeland (Mississippi) | 435.35 mi (700.63 km) |
| Maryland Heights to Ridgewood (New Jersey) | 880.53 mi (1,417.07 km) |
| Maryland Heights to Rifle (Colorado) | 927.44 mi (1,492.57 km) |
| Maryland Heights to Rincon (Georgia) | 682.77 mi (1,098.81 km) |
| Maryland Heights to Ringwood (New Jersey) | 872.89 mi (1,404.78 km) |
| Maryland Heights to Río Grande (Puerto Rico) | 2,039.12 mi (3,281.64 km) |
| Maryland Heights to Rio Grande City (Texas) | 980.24 mi (1,577.54 km) |
| Maryland Heights to Rio Linda (California) | 1,661.66 mi (2,674.18 km) |
| Maryland Heights to Rio Rancho (New Mexico) | 924.64 mi (1,488.06 km) |
| Maryland Heights to Rio Rico (Arizona) | 1,258.69 mi (2,025.67 km) |
| Maryland Heights to Ripon (California) | 1,657.45 mi (2,667.40 km) |
| Maryland Heights to River Edge (New Jersey) | 884.06 mi (1,422.76 km) |
| Maryland Heights to River Falls (Wisconsin) | 438.54 mi (705.76 km) |
| Maryland Heights to River Forest (Illinois) | 260.22 mi (418.79 km) |
| Maryland Heights to River Grove (Illinois) | 261.40 mi (420.68 km) |
