| Fredericia to Navodari | 1,136.50 mi (1,829.02 km) |
| Fredericia to Negresti-Oas | 788.33 mi (1,268.69 km) |
| Fredericia to Nehoiu | 1,009.19 mi (1,624.14 km) |
| Fredericia to Ocna Mures | 879.29 mi (1,415.08 km) |
| Fredericia to Odobesti | 1,011.58 mi (1,627.99 km) |
| Fredericia to Odorheiu Secuiesc | 927.32 mi (1,492.38 km) |
| Fredericia to Oltenita | 1,087.84 mi (1,750.71 km) |
| Fredericia to Onesti | 976.82 mi (1,572.03 km) |
| Fredericia to Oradea | 785.61 mi (1,264.32 km) |
| Fredericia to Orastie | 889.69 mi (1,431.82 km) |
| Fredericia to Oravita | 895.34 mi (1,440.90 km) |
| Fredericia to Orsova | 932.15 mi (1,500.16 km) |
| Fredericia to Otelu Rosu | 884.99 mi (1,424.26 km) |
| Fredericia to Otopeni | 1,045.40 mi (1,682.40 km) |
| Fredericia to Ovidiu | 1,137.50 mi (1,830.63 km) |
