| McHenry to Opwijk | 4,131.61 mi (6,649.19 km) |
| McHenry to Ostend | 4,075.35 mi (6,558.65 km) |
| McHenry to Oud-Heverlee | 4,154.39 mi (6,685.85 km) |
| McHenry to Oud-Turnhout | 4,148.58 mi (6,676.50 km) |
| McHenry to Oudenaarde | 4,114.04 mi (6,620.91 km) |
| McHenry to Oudenburg | 4,079.85 mi (6,565.89 km) |
| McHenry to Oupeye | 4,195.16 mi (6,751.46 km) |
| McHenry to Overijse | 4,151.24 mi (6,680.78 km) |
| McHenry to Overpelt | 4,168.15 mi (6,707.99 km) |
| McHenry to Paal | 4,165.65 mi (6,703.96 km) |
| McHenry to Peer | 4,172.57 mi (6,715.11 km) |
| McHenry to Pepinster | 4,206.82 mi (6,770.23 km) |
| McHenry to Peruwelz | 4,125.31 mi (6,639.04 km) |
| McHenry to Perwez | 4,167.51 mi (6,706.96 km) |
| McHenry to Philippeville | 4,173.07 mi (6,715.91 km) |
