| Greystones to Opwijk | 460.45 mi (741.03 km) |
| Greystones to Ostend | 402.96 mi (648.51 km) |
| Greystones to Oud-Heverlee | 483.44 mi (778.03 km) |
| Greystones to Oud-Turnhout | 484.03 mi (778.97 km) |
| Greystones to Oudenaarde | 440.49 mi (708.91 km) |
| Greystones to Oudenburg | 407.32 mi (655.52 km) |
| Greystones to Oupeye | 526.04 mi (846.59 km) |
| Greystones to Overijse | 479.50 mi (771.68 km) |
| Greystones to Overpelt | 504.00 mi (811.11 km) |
| Greystones to Paal | 498.40 mi (802.10 km) |
| Greystones to Peer | 507.49 mi (816.73 km) |
| Greystones to Pepinster | 536.93 mi (864.11 km) |
| Greystones to Peruwelz | 450.00 mi (724.20 km) |
| Greystones to Perwez | 495.27 mi (797.06 km) |
| Greystones to Philippeville | 497.90 mi (801.29 km) |
