| Altoona to Opwijk | 3,834.87 mi (6,171.63 km) |
| Altoona to Ostend | 3,777.43 mi (6,079.18 km) |
| Altoona to Oud-Heverlee | 3,857.86 mi (6,208.63 km) |
| Altoona to Oud-Turnhout | 3,856.75 mi (6,206.84 km) |
| Altoona to Oudenaarde | 3,814.84 mi (6,139.39 km) |
| Altoona to Oudenburg | 3,781.78 mi (6,086.19 km) |
| Altoona to Oupeye | 3,900.27 mi (6,276.87 km) |
| Altoona to Overijse | 3,853.97 mi (6,202.36 km) |
| Altoona to Overpelt | 3,876.67 mi (6,238.90 km) |
| Altoona to Paal | 3,872.10 mi (6,231.54 km) |
| Altoona to Peer | 3,880.52 mi (6,245.10 km) |
| Altoona to Pepinster | 3,911.29 mi (6,294.61 km) |
| Altoona to Peruwelz | 3,823.40 mi (6,153.17 km) |
| Altoona to Perwez | 3,869.72 mi (6,227.72 km) |
| Altoona to Philippeville | 3,871.24 mi (6,230.16 km) |
