| Tortum to Opwijk | 1,928.12 mi (3,103.00 km) |
| Tortum to Ostend | 1,984.81 mi (3,194.24 km) |
| Tortum to Oud-Heverlee | 1,905.99 mi (3,067.40 km) |
| Tortum to Oud-Turnhout | 1,897.37 mi (3,053.52 km) |
| Tortum to Oudenaarde | 1,952.29 mi (3,141.90 km) |
| Tortum to Oudenburg | 1,980.98 mi (3,188.08 km) |
| Tortum to Oupeye | 1,862.53 mi (2,997.45 km) |
| Tortum to Overijse | 1,911.29 mi (3,075.92 km) |
| Tortum to Overpelt | 1,877.76 mi (3,021.96 km) |
| Tortum to Paal | 1,886.26 mi (3,035.65 km) |
| Tortum to Peer | 1,875.24 mi (3,017.91 km) |
| Tortum to Pepinster | 1,853.55 mi (2,982.99 km) |
| Tortum to Peruwelz | 1,950.34 mi (3,138.77 km) |
| Tortum to Perwez | 1,897.60 mi (3,053.89 km) |
| Tortum to Philippeville | 1,905.53 mi (3,066.65 km) |
