| Waterford to Opwijk | 492.96 mi (793.34 km) |
| Waterford to Ostend | 435.41 mi (700.72 km) |
| Waterford to Oud-Heverlee | 515.70 mi (829.94 km) |
| Waterford to Oud-Turnhout | 521.13 mi (838.67 km) |
| Waterford to Oudenaarde | 470.61 mi (757.37 km) |
| Waterford to Oudenburg | 439.48 mi (707.28 km) |
| Waterford to Oupeye | 559.11 mi (899.79 km) |
| Waterford to Overijse | 511.03 mi (822.43 km) |
| Waterford to Overpelt | 540.90 mi (870.50 km) |
| Waterford to Paal | 533.40 mi (858.43 km) |
| Waterford to Peer | 543.75 mi (875.07 km) |
| Waterford to Pepinster | 569.17 mi (915.99 km) |
| Waterford to Peruwelz | 476.80 mi (767.33 km) |
| Waterford to Perwez | 525.98 mi (846.48 km) |
| Waterford to Philippeville | 524.27 mi (843.73 km) |
