| Middlesbrough to Opwijk | 336.74 mi (541.93 km) |
| Middlesbrough to Ostend | 289.01 mi (465.12 km) |
| Middlesbrough to Oud-Heverlee | 357.47 mi (575.29 km) |
| Middlesbrough to Oud-Turnhout | 342.95 mi (551.92 km) |
| Middlesbrough to Oudenaarde | 327.36 mi (526.83 km) |
| Middlesbrough to Oudenburg | 293.42 mi (472.22 km) |
| Middlesbrough to Oupeye | 392.87 mi (632.26 km) |
| Middlesbrough to Overijse | 356.27 mi (573.36 km) |
| Middlesbrough to Overpelt | 361.36 mi (581.55 km) |
| Middlesbrough to Paal | 362.20 mi (582.90 km) |
| Middlesbrough to Peer | 366.47 mi (589.78 km) |
| Middlesbrough to Pepinster | 405.19 mi (652.08 km) |
| Middlesbrough to Peruwelz | 345.78 mi (556.48 km) |
| Middlesbrough to Perwez | 372.64 mi (599.70 km) |
| Middlesbrough to Philippeville | 388.27 mi (624.87 km) |
