| Williamstown to Nyon | 3,944.02 mi (6,347.29 km) |
| Williamstown to Oberriet | 4,058.02 mi (6,530.75 km) |
| Williamstown to Obersiggenthal | 3,999.27 mi (6,436.21 km) |
| Williamstown to Oberwil | 3,967.37 mi (6,384.87 km) |
| Williamstown to Oberwingert | 4,018.44 mi (6,467.05 km) |
| Williamstown to Oftringen | 3,988.48 mi (6,418.85 km) |
| Williamstown to Olten | 3,986.79 mi (6,416.12 km) |
| Williamstown to Onex | 3,944.11 mi (6,347.43 km) |
| Williamstown to Opfikon | 4,012.44 mi (6,457.40 km) |
| Williamstown to Ostermundigen | 3,981.07 mi (6,406.91 km) |
| Williamstown to Payerne | 3,961.40 mi (6,375.26 km) |
| Williamstown to Pfaffikon | 4,023.57 mi (6,475.30 km) |
| Williamstown to Plan-les-Ouates | 3,945.32 mi (6,349.38 km) |
| Williamstown to Pratteln | 3,973.42 mi (6,394.60 km) |
| Williamstown to Prilly | 3,955.43 mi (6,365.65 km) |
