| Fiumicino to Navodari | 844.21 mi (1,358.62 km) |
| Fiumicino to Negresti-Oas | 690.67 mi (1,111.52 km) |
| Fiumicino to Nehoiu | 745.66 mi (1,200.02 km) |
| Fiumicino to Ocna Mures | 658.67 mi (1,060.02 km) |
| Fiumicino to Odobesti | 788.59 mi (1,269.12 km) |
| Fiumicino to Odorheiu Secuiesc | 719.92 mi (1,158.60 km) |
| Fiumicino to Oltenita | 745.07 mi (1,199.08 km) |
| Fiumicino to Onesti | 784.65 mi (1,262.77 km) |
| Fiumicino to Oradea | 601.70 mi (968.34 km) |
| Fiumicino to Orastie | 614.57 mi (989.05 km) |
| Fiumicino to Oravita | 525.19 mi (845.21 km) |
| Fiumicino to Orsova | 550.33 mi (885.68 km) |
| Fiumicino to Otelu Rosu | 567.94 mi (914.01 km) |
| Fiumicino to Otopeni | 722.41 mi (1,162.60 km) |
| Fiumicino to Ovidiu | 841.20 mi (1,353.78 km) |
