| Williamsport to Nyon | 3,969.40 mi (6,388.13 km) |
| Williamsport to Oberriet | 4,077.62 mi (6,562.29 km) |
| Williamsport to Obersiggenthal | 4,019.63 mi (6,468.96 km) |
| Williamsport to Oberwil | 3,988.34 mi (6,418.62 km) |
| Williamsport to Oberwingert | 4,038.25 mi (6,498.94 km) |
| Williamsport to Oftringen | 4,009.66 mi (6,452.93 km) |
| Williamsport to Olten | 4,007.89 mi (6,450.08 km) |
| Williamsport to Onex | 3,970.17 mi (6,389.38 km) |
| Williamsport to Opfikon | 4,032.68 mi (6,489.97 km) |
| Williamsport to Ostermundigen | 4,003.66 mi (6,443.26 km) |
| Williamsport to Payerne | 3,984.91 mi (6,413.09 km) |
| Williamsport to Pfaffikon | 4,043.78 mi (6,507.84 km) |
| Williamsport to Plan-les-Ouates | 3,971.41 mi (6,391.37 km) |
| Williamsport to Pratteln | 3,994.25 mi (6,428.12 km) |
| Williamsport to Prilly | 3,980.04 mi (6,405.25 km) |
