| Porto Tolle to Opwijk | 560.09 mi (901.38 km) |
| Porto Tolle to Ostend | 612.38 mi (985.53 km) |
| Porto Tolle to Oud-Heverlee | 538.73 mi (867.01 km) |
| Porto Tolle to Oud-Turnhout | 554.27 mi (892.02 km) |
| Porto Tolle to Oudenaarde | 573.03 mi (922.21 km) |
| Porto Tolle to Oudenburg | 607.82 mi (978.20 km) |
| Porto Tolle to Oupeye | 503.67 mi (810.58 km) |
| Porto Tolle to Overijse | 540.34 mi (869.59 km) |
| Porto Tolle to Overpelt | 537.00 mi (864.21 km) |
| Porto Tolle to Paal | 534.37 mi (859.99 km) |
| Porto Tolle to Peer | 531.49 mi (855.35 km) |
| Porto Tolle to Pepinster | 491.29 mi (790.65 km) |
| Porto Tolle to Peruwelz | 558.46 mi (898.75 km) |
| Porto Tolle to Perwez | 523.85 mi (843.06 km) |
| Porto Tolle to Philippeville | 511.97 mi (823.93 km) |
