| Cities | Distance |
|---|---|
| Monmouth to Opwijk | 303.18 mi (487.91 km) |
| Monmouth to Ostend | 245.74 mi (395.47 km) |
| Monmouth to Oud-Heverlee | 325.86 mi (524.43 km) |
| Monmouth to Oud-Turnhout | 332.46 mi (535.05 km) |
| Monmouth to Oudenaarde | 280.69 mi (451.73 km) |
| Monmouth to Oudenburg | 249.76 mi (401.94 km) |
| Monmouth to Oupeye | 369.31 mi (594.35 km) |
| Monmouth to Overijse | 321.15 mi (516.84 km) |
| Monmouth to Overpelt | 352.08 mi (566.61 km) |
| Monmouth to Paal | 344.01 mi (553.63 km) |
| Monmouth to Peer | 354.69 mi (570.81 km) |
| Monmouth to Pepinster | 379.29 mi (610.41 km) |
| Monmouth to Peruwelz | 287.25 mi (462.28 km) |
| Monmouth to Perwez | 336.07 mi (540.85 km) |
| Monmouth to Philippeville | 334.91 mi (538.98 km) |