| Castelbuono to Opwijk | 1,022.67 mi (1,645.83 km) |
| Castelbuono to Ostend | 1,067.92 mi (1,718.65 km) |
| Castelbuono to Oud-Heverlee | 1,003.79 mi (1,615.45 km) |
| Castelbuono to Oud-Turnhout | 1,025.80 mi (1,650.86 km) |
| Castelbuono to Oudenaarde | 1,029.77 mi (1,657.26 km) |
| Castelbuono to Oudenburg | 1,063.52 mi (1,711.56 km) |
| Castelbuono to Oupeye | 975.14 mi (1,569.34 km) |
| Castelbuono to Overijse | 1,003.86 mi (1,615.56 km) |
| Castelbuono to Overpelt | 1,010.75 mi (1,626.64 km) |
| Castelbuono to Paal | 1,005.05 mi (1,617.48 km) |
| Castelbuono to Peer | 1,004.88 mi (1,617.20 km) |
| Castelbuono to Pepinster | 962.92 mi (1,549.67 km) |
| Castelbuono to Peruwelz | 1,011.18 mi (1,627.33 km) |
| Castelbuono to Perwez | 988.06 mi (1,590.13 km) |
| Castelbuono to Philippeville | 969.32 mi (1,559.98 km) |
