| Tortum to Octeville | 2,178.05 mi (3,505.24 km) |
| Tortum to Oignies | 1,975.77 mi (3,179.70 km) |
| Tortum to Oissel | 2,054.91 mi (3,307.05 km) |
| Tortum to Olivet | 2,015.94 mi (3,244.34 km) |
| Tortum to Ollioules | 1,841.86 mi (2,964.18 km) |
| Tortum to Olonne-sur-Mer | 2,191.90 mi (3,527.53 km) |
| Tortum to Oloron-Sainte-Marie | 2,163.47 mi (3,481.77 km) |
| Tortum to Onet Village | 1,994.55 mi (3,209.91 km) |
| Tortum to Onnaing | 1,948.73 mi (3,136.17 km) |
| Tortum to Orange | 1,886.79 mi (3,036.50 km) |
| Tortum to Orchies | 1,964.85 mi (3,162.12 km) |
| Tortum to Orleans | 2,015.55 mi (3,243.72 km) |
| Tortum to Orly | 1,994.49 mi (3,209.82 km) |
| Tortum to Ormesson-sur-Marne | 1,987.98 mi (3,199.34 km) |
| Tortum to Orsay | 2,003.73 mi (3,224.70 km) |
