| Grosse Pointe Woods to Opwijk | 3,923.32 mi (6,313.98 km) |
| Grosse Pointe Woods to Ostend | 3,866.46 mi (6,222.47 km) |
| Grosse Pointe Woods to Oud-Heverlee | 3,946.24 mi (6,350.85 km) |
| Grosse Pointe Woods to Oud-Turnhout | 3,942.35 mi (6,344.60 km) |
| Grosse Pointe Woods to Oudenaarde | 3,904.70 mi (6,284.01 km) |
| Grosse Pointe Woods to Oudenburg | 3,870.91 mi (6,229.63 km) |
| Grosse Pointe Woods to Oupeye | 3,987.76 mi (6,417.68 km) |
| Grosse Pointe Woods to Overijse | 3,942.77 mi (6,345.28 km) |
| Grosse Pointe Woods to Overpelt | 3,962.10 mi (6,376.39 km) |
| Grosse Pointe Woods to Paal | 3,958.74 mi (6,370.98 km) |
| Grosse Pointe Woods to Peer | 3,966.30 mi (6,383.14 km) |
| Grosse Pointe Woods to Pepinster | 3,999.18 mi (6,436.06 km) |
| Grosse Pointe Woods to Peruwelz | 3,914.89 mi (6,300.41 km) |
| Grosse Pointe Woods to Perwez | 3,958.87 mi (6,371.18 km) |
| Grosse Pointe Woods to Philippeville | 3,962.78 mi (6,377.48 km) |
