| Olean to Nasaud | 4,673.05 mi (7,520.54 km) |
| Olean to Navodari | 4,959.79 mi (7,982.01 km) |
| Olean to Negresti-Oas | 4,612.02 mi (7,422.33 km) |
| Olean to Nehoiu | 4,827.63 mi (7,769.32 km) |
| Olean to Ocna Mures | 4,691.25 mi (7,549.84 km) |
| Olean to Odobesti | 4,837.26 mi (7,784.81 km) |
| Olean to Odorheiu Secuiesc | 4,748.06 mi (7,641.26 km) |
| Olean to Oltenita | 4,896.75 mi (7,880.55 km) |
| Olean to Onesti | 4,804.39 mi (7,731.92 km) |
| Olean to Oradea | 4,589.82 mi (7,386.61 km) |
| Olean to Orastie | 4,689.65 mi (7,547.26 km) |
| Olean to Oravita | 4,666.28 mi (7,509.64 km) |
| Olean to Orsova | 4,707.10 mi (7,575.34 km) |
| Olean to Otelu Rosu | 4,671.62 mi (7,518.25 km) |
| Olean to Otopeni | 4,854.66 mi (7,812.82 km) |
