| Cahokia to Rockville (Maryland) | 701.38 mi (1,128.76 km) |
| Cahokia to Rockville Centre (New York) | 890.90 mi (1,433.76 km) |
| Cahokia to Rockwall (Texas) | 524.56 mi (844.20 km) |
| Cahokia to Rocky Mount (North Carolina) | 703.10 mi (1,131.53 km) |
| Cahokia to Rocky Point (New York) | 928.90 mi (1,494.93 km) |
| Cahokia to Rocky River (Ohio) | 483.90 mi (778.76 km) |
| Cahokia to Roessleville (New York) | 903.50 mi (1,454.05 km) |
| Cahokia to Rogers (Arkansas) | 267.63 mi (430.70 km) |
| Cahokia to Rogers (Minnesota) | 489.66 mi (788.03 km) |
| Cahokia to Rohnert Park (California) | 1,750.12 mi (2,816.55 km) |
| Cahokia to Rolla (Missouri) | 95.87 mi (154.29 km) |
| Cahokia to Rolling Meadows (Illinois) | 267.71 mi (430.84 km) |
| Cahokia to Roma (Texas) | 983.27 mi (1,582.42 km) |
| Cahokia to Rome (Georgia) | 406.42 mi (654.07 km) |
| Cahokia to Rome (New York) | 830.53 mi (1,336.61 km) |
