| Monserrat to Opwijk | 834.86 mi (1,343.59 km) |
| Monserrat to Ostend | 837.45 mi (1,347.74 km) |
| Monserrat to Oud-Heverlee | 832.97 mi (1,340.54 km) |
| Monserrat to Oud-Turnhout | 869.06 mi (1,398.62 km) |
| Monserrat to Oudenaarde | 819.73 mi (1,319.23 km) |
| Monserrat to Oudenburg | 835.39 mi (1,344.43 km) |
| Monserrat to Oupeye | 840.73 mi (1,353.02 km) |
| Monserrat to Overijse | 827.76 mi (1,332.15 km) |
| Monserrat to Overpelt | 869.34 mi (1,399.06 km) |
| Monserrat to Paal | 854.04 mi (1,374.45 km) |
| Monserrat to Peer | 864.56 mi (1,391.38 km) |
| Monserrat to Pepinster | 834.88 mi (1,343.60 km) |
| Monserrat to Peruwelz | 797.41 mi (1,283.31 km) |
| Monserrat to Perwez | 821.67 mi (1,322.35 km) |
| Monserrat to Philippeville | 790.14 mi (1,271.60 km) |
