| Keystone to Opwijk | 4,600.48 mi (7,403.76 km) |
| Keystone to Ostend | 4,542.84 mi (7,310.99 km) |
| Keystone to Oud-Heverlee | 4,623.30 mi (7,440.48 km) |
| Keystone to Oud-Turnhout | 4,626.82 mi (7,446.15 km) |
| Keystone to Oudenaarde | 4,578.32 mi (7,368.10 km) |
| Keystone to Oudenburg | 4,546.98 mi (7,317.66 km) |
| Keystone to Oupeye | 4,666.62 mi (7,510.19 km) |
| Keystone to Overijse | 4,618.72 mi (7,433.10 km) |
| Keystone to Overpelt | 4,646.76 mi (7,478.24 km) |
| Keystone to Paal | 4,640.25 mi (7,467.76 km) |
| Keystone to Peer | 4,650.00 mi (7,483.45 km) |
| Keystone to Pepinster | 4,676.82 mi (7,526.62 km) |
| Keystone to Peruwelz | 4,583.99 mi (7,377.23 km) |
| Keystone to Perwez | 4,633.70 mi (7,457.21 km) |
| Keystone to Philippeville | 4,631.07 mi (7,452.99 km) |
