| Cloppenburg to Navodari | 1,103.32 mi (1,775.62 km) |
| Cloppenburg to Negresti-Oas | 757.95 mi (1,219.80 km) |
| Cloppenburg to Nehoiu | 970.61 mi (1,562.05 km) |
| Cloppenburg to Ocna Mures | 833.95 mi (1,342.11 km) |
| Cloppenburg to Odobesti | 982.24 mi (1,580.76 km) |
| Cloppenburg to Odorheiu Secuiesc | 891.78 mi (1,435.17 km) |
| Cloppenburg to Oltenita | 1,039.83 mi (1,673.44 km) |
| Cloppenburg to Onesti | 950.68 mi (1,529.97 km) |
| Cloppenburg to Oradea | 732.61 mi (1,179.02 km) |
| Cloppenburg to Orastie | 833.32 mi (1,341.09 km) |
| Cloppenburg to Oravita | 818.57 mi (1,317.37 km) |
| Cloppenburg to Orsova | 858.40 mi (1,381.46 km) |
| Cloppenburg to Otelu Rosu | 818.37 mi (1,317.03 km) |
| Cloppenburg to Otopeni | 997.60 mi (1,605.49 km) |
| Cloppenburg to Ovidiu | 1,103.54 mi (1,775.98 km) |
