| Conroe to Octeville | 4,814.67 mi (7,748.46 km) |
| Conroe to Oignies | 4,977.16 mi (8,009.97 km) |
| Conroe to Oissel | 4,934.65 mi (7,941.55 km) |
| Conroe to Olivet | 5,012.26 mi (8,066.45 km) |
| Conroe to Ollioules | 5,334.22 mi (8,584.60 km) |
| Conroe to Olonne-sur-Mer | 4,895.30 mi (7,878.22 km) |
| Conroe to Oloron-Sainte-Marie | 5,044.96 mi (8,119.08 km) |
| Conroe to Onet Village | 5,151.13 mi (8,289.95 km) |
| Conroe to Onnaing | 5,003.50 mi (8,052.35 km) |
| Conroe to Orange | 5,255.18 mi (8,457.39 km) |
| Conroe to Orchies | 4,986.88 mi (8,025.61 km) |
| Conroe to Orleans | 5,011.43 mi (8,065.12 km) |
| Conroe to Orly | 5,005.69 mi (8,055.87 km) |
| Conroe to Ormesson-sur-Marne | 5,010.34 mi (8,063.37 km) |
| Conroe to Orsay | 4,998.69 mi (8,044.61 km) |
