| Williamsport to Oberkirch | 3,977.41 mi (6,401.02 km) |
| Williamsport to Obernburg am Main | 3,978.38 mi (6,402.59 km) |
| Williamsport to Obernkirchen | 3,902.48 mi (6,280.43 km) |
| Williamsport to Oberschleissheim | 4,127.23 mi (6,642.14 km) |
| Williamsport to Oberstdorf | 4,103.65 mi (6,604.18 km) |
| Williamsport to Obertraubling | 4,126.76 mi (6,641.38 km) |
| Williamsport to Obertshausen | 3,959.05 mi (6,371.48 km) |
| Williamsport to Oberursel | 3,944.66 mi (6,348.31 km) |
| Williamsport to Ochsenfurt | 4,021.08 mi (6,471.30 km) |
| Williamsport to Ochsenhausen | 4,068.02 mi (6,546.85 km) |
| Williamsport to Ochtrup | 3,830.52 mi (6,164.63 km) |
| Williamsport to Odenthal | 3,861.96 mi (6,215.22 km) |
| Williamsport to Oelde | 3,878.39 mi (6,241.67 km) |
| Williamsport to Oelsnitz | 4,078.00 mi (6,562.91 km) |
| Williamsport to Oer-Erkenschwick | 3,849.25 mi (6,194.77 km) |
