| Trecastagni to Opwijk | 1,065.79 mi (1,715.22 km) |
| Trecastagni to Ostend | 1,112.30 mi (1,790.07 km) |
| Trecastagni to Oud-Heverlee | 1,046.42 mi (1,684.05 km) |
| Trecastagni to Oud-Turnhout | 1,067.29 mi (1,717.64 km) |
| Trecastagni to Oudenaarde | 1,073.83 mi (1,728.17 km) |
| Trecastagni to Oudenburg | 1,107.85 mi (1,782.92 km) |
| Trecastagni to Oupeye | 1,016.48 mi (1,635.87 km) |
| Trecastagni to Overijse | 1,046.75 mi (1,684.58 km) |
| Trecastagni to Overpelt | 1,051.73 mi (1,692.60 km) |
| Trecastagni to Paal | 1,046.65 mi (1,684.42 km) |
| Trecastagni to Peer | 1,045.92 mi (1,683.25 km) |
| Trecastagni to Pepinster | 1,004.18 mi (1,616.08 km) |
| Trecastagni to Peruwelz | 1,055.74 mi (1,699.05 km) |
| Trecastagni to Perwez | 1,030.78 mi (1,658.87 km) |
| Trecastagni to Philippeville | 1,013.04 mi (1,630.33 km) |
