| North Tonawanda to Octeville | 3,547.16 mi (5,708.61 km) |
| North Tonawanda to Oignies | 3,708.76 mi (5,968.67 km) |
| North Tonawanda to Oissel | 3,666.74 mi (5,901.05 km) |
| North Tonawanda to Olivet | 3,745.42 mi (6,027.67 km) |
| North Tonawanda to Ollioules | 4,072.65 mi (6,554.30 km) |
| North Tonawanda to Olonne-sur-Mer | 3,632.62 mi (5,846.13 km) |
| North Tonawanda to Oloron-Sainte-Marie | 3,790.23 mi (6,099.79 km) |
| North Tonawanda to Onet Village | 3,889.82 mi (6,260.06 km) |
| North Tonawanda to Onnaing | 3,735.10 mi (6,011.06 km) |
| North Tonawanda to Orange | 3,992.46 mi (6,425.24 km) |
| North Tonawanda to Orchies | 3,718.48 mi (5,984.31 km) |
| North Tonawanda to Orleans | 3,744.55 mi (6,026.26 km) |
| North Tonawanda to Orly | 3,737.90 mi (6,015.57 km) |
| North Tonawanda to Ormesson-sur-Marne | 3,742.50 mi (6,022.97 km) |
| North Tonawanda to Orsay | 3,730.98 mi (6,004.44 km) |
