| Olean to Orbetello | 4,345.50 mi (6,993.41 km) |
| Olean to Oria | 4,694.01 mi (7,554.27 km) |
| Olean to Oristano | 4,328.33 mi (6,965.77 km) |
| Olean to Orta Nova | 4,579.23 mi (7,369.56 km) |
| Olean to Orte | 4,394.43 mi (7,072.15 km) |
| Olean to Ortona | 4,483.37 mi (7,215.29 km) |
| Olean to Orvieto | 4,372.84 mi (7,037.40 km) |
| Olean to Orzinuovi | 4,181.80 mi (6,729.96 km) |
| Olean to Osimo | 4,400.72 mi (7,082.28 km) |
| Olean to Ospitaletto | 4,181.97 mi (6,730.22 km) |
| Olean to Ostuni | 4,682.18 mi (7,535.24 km) |
| Olean to Ottaviano | 4,546.60 mi (7,317.05 km) |
| Olean to Ovada | 4,155.56 mi (6,687.72 km) |
| Olean to Ozieri | 4,320.64 mi (6,953.40 km) |
| Olean to Paceco | 4,578.80 mi (7,368.86 km) |
