| Oberursel to Navodari | 1,019.55 mi (1,640.80 km) |
| Oberursel to Negresti-Oas | 690.32 mi (1,110.96 km) |
| Oberursel to Nehoiu | 886.00 mi (1,425.88 km) |
| Oberursel to Ocna Mures | 748.62 mi (1,204.78 km) |
| Oberursel to Odobesti | 905.48 mi (1,457.23 km) |
| Oberursel to Odorheiu Secuiesc | 812.82 mi (1,308.11 km) |
| Oberursel to Oltenita | 944.78 mi (1,520.47 km) |
| Oberursel to Onesti | 877.93 mi (1,412.89 km) |
| Oberursel to Oradea | 645.46 mi (1,038.76 km) |
| Oberursel to Orastie | 738.01 mi (1,187.71 km) |
| Oberursel to Oravita | 705.60 mi (1,135.55 km) |
| Oberursel to Orsova | 746.58 mi (1,201.51 km) |
| Oberursel to Otelu Rosu | 714.46 mi (1,149.81 km) |
| Oberursel to Otopeni | 903.98 mi (1,454.81 km) |
| Oberursel to Ovidiu | 1,019.08 mi (1,640.05 km) |
