| Ianca to Opwijk | 1,142.83 mi (1,839.20 km) |
| Ianca to Ostend | 1,200.10 mi (1,931.38 km) |
| Ianca to Oud-Heverlee | 1,120.34 mi (1,803.01 km) |
| Ianca to Oud-Turnhout | 1,114.27 mi (1,793.24 km) |
| Ianca to Oudenaarde | 1,166.23 mi (1,876.87 km) |
| Ianca to Oudenburg | 1,196.12 mi (1,924.97 km) |
| Ianca to Oupeye | 1,076.81 mi (1,732.96 km) |
| Ianca to Overijse | 1,125.36 mi (1,811.09 km) |
| Ianca to Overpelt | 1,094.42 mi (1,761.30 km) |
| Ianca to Paal | 1,101.85 mi (1,773.26 km) |
| Ianca to Peer | 1,091.49 mi (1,756.58 km) |
| Ianca to Pepinster | 1,067.29 mi (1,717.64 km) |
| Ianca to Peruwelz | 1,162.99 mi (1,871.64 km) |
| Ianca to Perwez | 1,111.12 mi (1,788.17 km) |
| Ianca to Philippeville | 1,117.38 mi (1,798.24 km) |
