| Western Springs to Opwijk | 4,142.39 mi (6,666.53 km) |
| Western Springs to Ostend | 4,085.98 mi (6,575.75 km) |
| Western Springs to Oud-Heverlee | 4,165.20 mi (6,703.25 km) |
| Western Springs to Oud-Turnhout | 4,159.82 mi (6,694.58 km) |
| Western Springs to Oudenaarde | 4,124.58 mi (6,637.87 km) |
| Western Springs to Oudenburg | 4,090.47 mi (6,582.97 km) |
| Western Springs to Oupeye | 4,206.15 mi (6,769.15 km) |
| Western Springs to Overijse | 4,161.99 mi (6,698.07 km) |
| Western Springs to Overpelt | 4,179.43 mi (6,726.15 km) |
| Western Springs to Paal | 4,176.74 mi (6,721.81 km) |
| Western Springs to Peer | 4,183.81 mi (6,733.19 km) |
| Western Springs to Pepinster | 4,217.76 mi (6,787.83 km) |
| Western Springs to Peruwelz | 4,135.60 mi (6,655.61 km) |
| Western Springs to Perwez | 4,178.22 mi (6,724.19 km) |
| Western Springs to Philippeville | 4,183.41 mi (6,732.54 km) |
