| Olhao to Navodari | 1,958.12 mi (3,151.30 km) |
| Olhao to Negresti-Oas | 1,745.41 mi (2,808.97 km) |
| Olhao to Nehoiu | 1,850.35 mi (2,977.84 km) |
| Olhao to Ocna Mures | 1,744.04 mi (2,806.76 km) |
| Olhao to Odobesti | 1,890.00 mi (3,041.66 km) |
| Olhao to Odorheiu Secuiesc | 1,810.97 mi (2,914.47 km) |
| Olhao to Oltenita | 1,859.57 mi (2,992.69 km) |
| Olhao to Onesti | 1,879.81 mi (3,025.26 km) |
| Olhao to Oradea | 1,664.08 mi (2,678.08 km) |
| Olhao to Orastie | 1,706.39 mi (2,746.16 km) |
| Olhao to Oravita | 1,624.59 mi (2,614.53 km) |
| Olhao to Orsova | 1,655.63 mi (2,664.49 km) |
| Olhao to Otelu Rosu | 1,662.17 mi (2,675.00 km) |
| Olhao to Otopeni | 1,833.80 mi (2,951.21 km) |
| Olhao to Ovidiu | 1,955.36 mi (3,146.85 km) |
