| Portlethen to Opwijk | 492.49 mi (792.58 km) |
| Portlethen to Ostend | 451.72 mi (726.97 km) |
| Portlethen to Oud-Heverlee | 510.86 mi (822.15 km) |
| Portlethen to Oud-Turnhout | 489.58 mi (787.89 km) |
| Portlethen to Oudenaarde | 487.90 mi (785.20 km) |
| Portlethen to Oudenburg | 455.85 mi (733.62 km) |
| Portlethen to Oupeye | 540.45 mi (869.77 km) |
| Portlethen to Overijse | 510.98 mi (822.34 km) |
| Portlethen to Overpelt | 505.70 mi (813.84 km) |
| Portlethen to Paal | 510.14 mi (820.99 km) |
| Portlethen to Peer | 511.40 mi (823.02 km) |
| Portlethen to Pepinster | 552.79 mi (889.63 km) |
| Portlethen to Peruwelz | 508.35 mi (818.11 km) |
| Portlethen to Perwez | 526.62 mi (847.52 km) |
| Portlethen to Philippeville | 546.80 mi (879.99 km) |
