| Buffalo Grove to Opwijk | 4,127.36 mi (6,642.35 km) |
| Buffalo Grove to Ostend | 4,071.03 mi (6,551.69 km) |
| Buffalo Grove to Oud-Heverlee | 4,150.16 mi (6,679.04 km) |
| Buffalo Grove to Oud-Turnhout | 4,144.56 mi (6,670.03 km) |
| Buffalo Grove to Oudenaarde | 4,109.67 mi (6,613.88 km) |
| Buffalo Grove to Oudenburg | 4,075.52 mi (6,558.92 km) |
| Buffalo Grove to Oupeye | 4,191.02 mi (6,744.79 km) |
| Buffalo Grove to Overijse | 4,146.98 mi (6,673.91 km) |
| Buffalo Grove to Overpelt | 4,164.15 mi (6,701.56 km) |
| Buffalo Grove to Paal | 4,161.55 mi (6,697.38 km) |
| Buffalo Grove to Peer | 4,168.55 mi (6,708.64 km) |
| Buffalo Grove to Pepinster | 4,202.66 mi (6,763.52 km) |
| Buffalo Grove to Peruwelz | 4,120.82 mi (6,631.82 km) |
| Buffalo Grove to Perwez | 4,163.23 mi (6,700.07 km) |
| Buffalo Grove to Philippeville | 4,168.60 mi (6,708.72 km) |
