| Iselin to Opwijk | 3,668.13 mi (5,903.28 km) |
| Iselin to Ostend | 3,610.51 mi (5,810.56 km) |
| Iselin to Oud-Heverlee | 3,691.11 mi (5,940.26 km) |
| Iselin to Oud-Turnhout | 3,691.51 mi (5,940.91 km) |
| Iselin to Oudenaarde | 3,647.37 mi (5,869.88 km) |
| Iselin to Oudenburg | 3,614.81 mi (5,817.47 km) |
| Iselin to Oupeye | 3,733.88 mi (6,009.10 km) |
| Iselin to Overijse | 3,686.98 mi (5,933.62 km) |
| Iselin to Overpelt | 3,711.47 mi (5,973.04 km) |
| Iselin to Paal | 3,706.25 mi (5,964.64 km) |
| Iselin to Peer | 3,715.13 mi (5,978.92 km) |
| Iselin to Pepinster | 3,744.66 mi (6,026.45 km) |
| Iselin to Peruwelz | 3,655.04 mi (5,882.22 km) |
| Iselin to Perwez | 3,702.52 mi (5,958.63 km) |
| Iselin to Philippeville | 3,702.73 mi (5,958.97 km) |
