| Monfalcone to Opwijk | 557.40 mi (897.05 km) |
| Monfalcone to Ostend | 612.63 mi (985.94 km) |
| Monfalcone to Oud-Heverlee | 535.00 mi (861.00 km) |
| Monfalcone to Oud-Turnhout | 545.37 mi (877.69 km) |
| Monfalcone to Oudenaarde | 573.63 mi (923.17 km) |
| Monfalcone to Oudenburg | 608.10 mi (978.64 km) |
| Monfalcone to Oupeye | 496.25 mi (798.64 km) |
| Monfalcone to Overijse | 537.60 mi (865.19 km) |
| Monfalcone to Overpelt | 526.77 mi (847.75 km) |
| Monfalcone to Paal | 526.66 mi (847.58 km) |
| Monfalcone to Peer | 521.70 mi (839.60 km) |
| Monfalcone to Pepinster | 484.14 mi (779.14 km) |
| Monfalcone to Peruwelz | 561.84 mi (904.19 km) |
| Monfalcone to Perwez | 521.15 mi (838.72 km) |
| Monfalcone to Philippeville | 514.12 mi (827.40 km) |
