| Iserlohn to Navodari | 1,081.64 mi (1,740.73 km) |
| Iserlohn to Negresti-Oas | 744.11 mi (1,197.53 km) |
| Iserlohn to Nehoiu | 947.98 mi (1,525.63 km) |
| Iserlohn to Ocna Mures | 810.27 mi (1,304.01 km) |
| Iserlohn to Odobesti | 964.28 mi (1,551.86 km) |
| Iserlohn to Odorheiu Secuiesc | 872.14 mi (1,403.58 km) |
| Iserlohn to Oltenita | 1,011.18 mi (1,627.34 km) |
| Iserlohn to Onesti | 934.94 mi (1,504.64 km) |
| Iserlohn to Oradea | 707.25 mi (1,138.21 km) |
| Iserlohn to Orastie | 803.70 mi (1,293.43 km) |
| Iserlohn to Oravita | 778.14 mi (1,252.29 km) |
| Iserlohn to Orsova | 818.84 mi (1,317.80 km) |
| Iserlohn to Otelu Rosu | 783.49 mi (1,260.90 km) |
| Iserlohn to Otopeni | 969.68 mi (1,560.55 km) |
| Iserlohn to Ovidiu | 1,081.45 mi (1,740.43 km) |
