| Monserrato to Navodari | 1,059.10 mi (1,704.45 km) |
| Monserrato to Negresti-Oas | 927.70 mi (1,492.98 km) |
| Monserrato to Nehoiu | 970.16 mi (1,561.32 km) |
| Monserrato to Ocna Mures | 891.71 mi (1,435.07 km) |
| Monserrato to Odobesti | 1,014.52 mi (1,632.71 km) |
| Monserrato to Odorheiu Secuiesc | 950.78 mi (1,530.13 km) |
| Monserrato to Oltenita | 960.12 mi (1,545.16 km) |
| Monserrato to Onesti | 1,013.43 mi (1,630.97 km) |
| Monserrato to Oradea | 838.59 mi (1,349.58 km) |
| Monserrato to Orastie | 846.29 mi (1,361.98 km) |
| Monserrato to Oravita | 755.30 mi (1,215.55 km) |
| Monserrato to Orsova | 777.01 mi (1,250.48 km) |
| Monserrato to Otelu Rosu | 799.44 mi (1,286.58 km) |
| Monserrato to Otopeni | 941.78 mi (1,515.64 km) |
| Monserrato to Ovidiu | 1,055.76 mi (1,699.08 km) |
