| Port Laoise to Opwijk | 508.28 mi (818.00 km) |
| Port Laoise to Ostend | 450.64 mi (725.23 km) |
| Port Laoise to Oud-Heverlee | 531.25 mi (854.96 km) |
| Port Laoise to Oud-Turnhout | 533.09 mi (857.93 km) |
| Port Laoise to Oudenaarde | 487.58 mi (784.69 km) |
| Port Laoise to Oudenburg | 454.92 mi (732.13 km) |
| Port Laoise to Oupeye | 574.14 mi (923.99 km) |
| Port Laoise to Overijse | 527.09 mi (848.27 km) |
| Port Laoise to Overpelt | 553.05 mi (890.04 km) |
| Port Laoise to Paal | 546.97 mi (880.26 km) |
| Port Laoise to Peer | 556.39 mi (895.42 km) |
| Port Laoise to Pepinster | 584.82 mi (941.18 km) |
| Port Laoise to Peruwelz | 496.08 mi (798.37 km) |
| Port Laoise to Perwez | 542.65 mi (873.32 km) |
| Port Laoise to Philippeville | 543.95 mi (875.41 km) |
