| Cahokia to Octeville | 4,200.81 mi (6,760.56 km) |
| Cahokia to Oignies | 4,356.06 mi (7,010.41 km) |
| Cahokia to Oissel | 4,318.90 mi (6,950.59 km) |
| Cahokia to Olivet | 4,400.46 mi (7,081.86 km) |
| Cahokia to Ollioules | 4,733.45 mi (7,617.76 km) |
| Cahokia to Olonne-sur-Mer | 4,292.94 mi (6,908.83 km) |
| Cahokia to Oloron-Sainte-Marie | 4,454.57 mi (7,168.94 km) |
| Cahokia to Onet Village | 4,550.94 mi (7,324.03 km) |
| Cahokia to Onnaing | 4,382.05 mi (7,052.23 km) |
| Cahokia to Orange | 4,652.44 mi (7,487.37 km) |
| Cahokia to Orchies | 4,365.53 mi (7,025.63 km) |
| Cahokia to Orleans | 4,399.50 mi (7,080.31 km) |
| Cahokia to Orly | 4,390.44 mi (7,065.73 km) |
| Cahokia to Ormesson-sur-Marne | 4,394.80 mi (7,072.75 km) |
| Cahokia to Orsay | 4,383.81 mi (7,055.07 km) |
