| Monfalcone to Navodari | 741.90 mi (1,193.97 km) |
| Monfalcone to Negresti-Oas | 488.49 mi (786.14 km) |
| Monfalcone to Nehoiu | 617.78 mi (994.22 km) |
| Monfalcone to Ocna Mures | 496.11 mi (798.41 km) |
| Monfalcone to Odobesti | 651.31 mi (1,048.19 km) |
| Monfalcone to Odorheiu Secuiesc | 564.85 mi (909.04 km) |
| Monfalcone to Oltenita | 650.88 mi (1,047.49 km) |
| Monfalcone to Onesti | 634.99 mi (1,021.91 km) |
| Monfalcone to Oradea | 408.74 mi (657.80 km) |
| Monfalcone to Orastie | 465.16 mi (748.60 km) |
| Monfalcone to Oravita | 398.64 mi (641.54 km) |
| Monfalcone to Orsova | 437.12 mi (703.48 km) |
| Monfalcone to Otelu Rosu | 426.13 mi (685.79 km) |
| Monfalcone to Otopeni | 616.04 mi (991.43 km) |
| Monfalcone to Ovidiu | 740.15 mi (1,191.15 km) |
