| Harrisburg to Opwijk | 3,784.72 mi (6,090.92 km) |
| Harrisburg to Ostend | 3,727.18 mi (5,998.32 km) |
| Harrisburg to Oud-Heverlee | 3,807.71 mi (6,127.92 km) |
| Harrisburg to Oud-Turnhout | 3,807.31 mi (6,127.27 km) |
| Harrisburg to Oudenaarde | 3,764.34 mi (6,058.12 km) |
| Harrisburg to Oudenburg | 3,731.51 mi (6,005.29 km) |
| Harrisburg to Oupeye | 3,850.30 mi (6,196.45 km) |
| Harrisburg to Overijse | 3,803.70 mi (6,121.47 km) |
| Harrisburg to Overpelt | 3,827.25 mi (6,159.37 km) |
| Harrisburg to Paal | 3,822.38 mi (6,151.52 km) |
| Harrisburg to Peer | 3,831.01 mi (6,165.42 km) |
| Harrisburg to Pepinster | 3,861.21 mi (6,214.01 km) |
| Harrisburg to Peruwelz | 3,772.49 mi (6,071.23 km) |
| Harrisburg to Perwez | 3,819.36 mi (6,146.67 km) |
| Harrisburg to Philippeville | 3,820.26 mi (6,148.12 km) |
