| Rietberg to Navodari | 1,060.48 mi (1,706.68 km) |
| Rietberg to Negresti-Oas | 719.49 mi (1,157.91 km) |
| Rietberg to Nehoiu | 927.04 mi (1,491.92 km) |
| Rietberg to Ocna Mures | 789.53 mi (1,270.63 km) |
| Rietberg to Odobesti | 941.56 mi (1,515.30 km) |
| Rietberg to Odorheiu Secuiesc | 849.93 mi (1,367.83 km) |
| Rietberg to Oltenita | 992.74 mi (1,597.65 km) |
| Rietberg to Onesti | 911.35 mi (1,466.67 km) |
| Rietberg to Oradea | 686.97 mi (1,105.57 km) |
| Rietberg to Orastie | 785.36 mi (1,263.92 km) |
| Rietberg to Oravita | 764.47 mi (1,230.29 km) |
| Rietberg to Orsova | 804.84 mi (1,295.27 km) |
| Rietberg to Otelu Rosu | 767.35 mi (1,234.93 km) |
| Rietberg to Otopeni | 950.89 mi (1,530.31 km) |
| Rietberg to Ovidiu | 1,060.45 mi (1,706.64 km) |
