| Westlake to Opwijk | 3,930.82 mi (6,326.04 km) |
| Westlake to Ostend | 3,873.73 mi (6,234.16 km) |
| Westlake to Oud-Heverlee | 3,953.77 mi (6,362.98 km) |
| Westlake to Oud-Turnhout | 3,950.79 mi (6,358.19 km) |
| Westlake to Oudenaarde | 3,911.72 mi (6,295.31 km) |
| Westlake to Oudenburg | 3,878.15 mi (6,241.28 km) |
| Westlake to Oupeye | 3,995.61 mi (6,430.32 km) |
| Westlake to Overijse | 3,950.16 mi (6,357.18 km) |
| Westlake to Overpelt | 3,970.62 mi (6,390.09 km) |
| Westlake to Paal | 3,966.86 mi (6,384.04 km) |
| Westlake to Peer | 3,974.70 mi (6,396.67 km) |
| Westlake to Pepinster | 4,006.91 mi (6,448.50 km) |
| Westlake to Peruwelz | 3,921.38 mi (6,310.85 km) |
| Westlake to Perwez | 3,966.16 mi (6,382.91 km) |
| Westlake to Philippeville | 3,969.28 mi (6,387.94 km) |
