| Northampton to Opwijk | 234.68 mi (377.68 km) |
| Northampton to Ostend | 177.31 mi (285.35 km) |
| Northampton to Oud-Heverlee | 257.67 mi (414.68 km) |
| Northampton to Oud-Turnhout | 258.99 mi (416.81 km) |
| Northampton to Oudenaarde | 215.33 mi (346.54 km) |
| Northampton to Oudenburg | 181.71 mi (292.43 km) |
| Northampton to Oupeye | 300.23 mi (483.18 km) |
| Northampton to Overijse | 253.83 mi (408.49 km) |
| Northampton to Overpelt | 278.92 mi (448.88 km) |
| Northampton to Paal | 272.77 mi (438.99 km) |
| Northampton to Peer | 282.19 mi (454.15 km) |
| Northampton to Pepinster | 311.13 mi (500.71 km) |
| Northampton to Peruwelz | 226.45 mi (364.44 km) |
| Northampton to Perwez | 269.72 mi (434.07 km) |
| Northampton to Philippeville | 274.10 mi (441.13 km) |
