| Cahokia to Rosemont (California) | 1,676.25 mi (2,697.66 km) |
| Cahokia to Rosemount (Minnesota) | 452.28 mi (727.87 km) |
| Cahokia to Rosenberg (Texas) | 701.54 mi (1,129.02 km) |
| Cahokia to Roseville (California) | 1,671.77 mi (2,690.46 km) |
| Cahokia to Roseville (Michigan) | 467.51 mi (752.38 km) |
| Cahokia to Roseville (Minnesota) | 471.21 mi (758.34 km) |
| Cahokia to Rossmoor (California) | 1,584.23 mi (2,549.58 km) |
| Cahokia to Rossville (Maryland) | 737.49 mi (1,186.88 km) |
| Cahokia to Roswell (Georgia) | 450.47 mi (724.96 km) |
| Cahokia to Roswell (New Mexico) | 877.68 mi (1,412.48 km) |
| Cahokia to Round Lake (Illinois) | 282.89 mi (455.26 km) |
| Cahokia to Round Lake Beach (Illinois) | 285.65 mi (459.71 km) |
| Cahokia to Round Rock (Texas) | 699.34 mi (1,125.48 km) |
| Cahokia to Rowland Heights (California) | 1,569.73 mi (2,526.24 km) |
| Cahokia to Rowlett (Texas) | 528.83 mi (851.07 km) |
