| Williamsport to Opwijk | 3,747.84 mi (6,031.57 km) |
| Williamsport to Ostend | 3,690.38 mi (5,939.10 km) |
| Williamsport to Oud-Heverlee | 3,770.83 mi (6,068.57 km) |
| Williamsport to Oud-Turnhout | 3,769.81 mi (6,066.92 km) |
| Williamsport to Oudenaarde | 3,727.77 mi (5,999.26 km) |
| Williamsport to Oudenburg | 3,694.74 mi (5,946.11 km) |
| Williamsport to Oupeye | 3,813.26 mi (6,136.85 km) |
| Williamsport to Overijse | 3,766.92 mi (6,062.27 km) |
| Williamsport to Overpelt | 3,789.73 mi (6,098.98 km) |
| Williamsport to Paal | 3,785.12 mi (6,091.57 km) |
| Williamsport to Peer | 3,793.57 mi (6,105.17 km) |
| Williamsport to Pepinster | 3,824.27 mi (6,154.57 km) |
| Williamsport to Peruwelz | 3,736.29 mi (6,012.97 km) |
| Williamsport to Perwez | 3,782.67 mi (6,087.62 km) |
| Williamsport to Philippeville | 3,784.12 mi (6,089.95 km) |
