| Glen Ellyn to Opwijk | 4,145.41 mi (6,671.40 km) |
| Glen Ellyn to Ostend | 4,089.04 mi (6,580.67 km) |
| Glen Ellyn to Oud-Heverlee | 4,168.22 mi (6,708.10 km) |
| Glen Ellyn to Oud-Turnhout | 4,162.74 mi (6,699.28 km) |
| Glen Ellyn to Oudenaarde | 4,127.65 mi (6,642.81 km) |
| Glen Ellyn to Oudenburg | 4,093.53 mi (6,587.89 km) |
| Glen Ellyn to Oupeye | 4,209.13 mi (6,773.93 km) |
| Glen Ellyn to Overijse | 4,165.02 mi (6,702.94 km) |
| Glen Ellyn to Overpelt | 4,182.34 mi (6,730.83 km) |
| Glen Ellyn to Paal | 4,179.69 mi (6,726.56 km) |
| Glen Ellyn to Peer | 4,186.73 mi (6,737.89 km) |
| Glen Ellyn to Pepinster | 4,220.75 mi (6,792.64 km) |
| Glen Ellyn to Peruwelz | 4,138.73 mi (6,660.64 km) |
| Glen Ellyn to Perwez | 4,181.26 mi (6,729.08 km) |
| Glen Ellyn to Philippeville | 4,186.53 mi (6,737.56 km) |
