| Tonawanda to Octeville | 3,549.19 mi (5,711.87 km) |
| Tonawanda to Oignies | 3,710.85 mi (5,972.03 km) |
| Tonawanda to Oissel | 3,668.79 mi (5,904.34 km) |
| Tonawanda to Olivet | 3,747.43 mi (6,030.90 km) |
| Tonawanda to Ollioules | 4,074.57 mi (6,557.38 km) |
| Tonawanda to Olonne-sur-Mer | 3,634.54 mi (5,849.23 km) |
| Tonawanda to Oloron-Sainte-Marie | 3,792.06 mi (6,102.74 km) |
| Tonawanda to Onet Village | 3,891.73 mi (6,263.13 km) |
| Tonawanda to Onnaing | 3,737.20 mi (6,014.43 km) |
| Tonawanda to Orange | 3,994.38 mi (6,428.34 km) |
| Tonawanda to Orchies | 3,720.57 mi (5,987.68 km) |
| Tonawanda to Orleans | 3,746.55 mi (6,029.50 km) |
| Tonawanda to Orly | 3,739.94 mi (6,018.85 km) |
| Tonawanda to Ormesson-sur-Marne | 3,744.54 mi (6,026.25 km) |
| Tonawanda to Orsay | 3,733.02 mi (6,007.71 km) |
