| Williamsport to Nuth | 3,816.76 mi (6,142.48 km) |
| Williamsport to Oegstgeest | 3,725.67 mi (5,995.89 km) |
| Williamsport to Oirschot | 3,777.13 mi (6,078.71 km) |
| Williamsport to Oisterwijk | 3,770.87 mi (6,068.63 km) |
| Williamsport to Oldebroek | 3,773.91 mi (6,073.52 km) |
| Williamsport to Oldenzaal | 3,817.45 mi (6,143.59 km) |
| Williamsport to Ommen | 3,791.92 mi (6,102.51 km) |
| Williamsport to Oosterend | 3,764.96 mi (6,059.12 km) |
| Williamsport to Oosterhout | 3,755.73 mi (6,044.27 km) |
| Williamsport to Oosterwolde | 3,773.90 mi (6,073.51 km) |
| Williamsport to Oostzaan | 3,735.09 mi (6,011.04 km) |
| Williamsport to Opmeer | 3,730.44 mi (6,003.57 km) |
| Williamsport to Oss | 3,778.13 mi (6,080.32 km) |
| Williamsport to Oud-Beijerland | 3,733.02 mi (6,007.72 km) |
| Williamsport to Oudenbosch | 3,744.13 mi (6,025.59 km) |
