| Trowbridge to Opwijk | 278.03 mi (447.45 km) |
| Trowbridge to Ostend | 221.69 mi (356.77 km) |
| Trowbridge to Oud-Heverlee | 300.21 mi (483.14 km) |
| Trowbridge to Oud-Turnhout | 310.42 mi (499.57 km) |
| Trowbridge to Oudenaarde | 254.09 mi (408.92 km) |
| Trowbridge to Oudenburg | 225.37 mi (362.70 km) |
| Trowbridge to Oupeye | 343.71 mi (553.15 km) |
| Trowbridge to Overijse | 295.03 mi (474.80 km) |
| Trowbridge to Overpelt | 329.54 mi (530.35 km) |
| Trowbridge to Paal | 320.14 mi (515.21 km) |
| Trowbridge to Peer | 331.61 mi (533.68 km) |
| Trowbridge to Pepinster | 353.03 mi (568.14 km) |
| Trowbridge to Peruwelz | 258.22 mi (415.56 km) |
| Trowbridge to Perwez | 309.19 mi (497.60 km) |
| Trowbridge to Philippeville | 305.21 mi (491.19 km) |
