| Westerlo to Oberriet | 334.23 mi (537.90 km) |
| Westerlo to Obersiggenthal | 291.28 mi (468.78 km) |
| Westerlo to Oberwil | 273.75 mi (440.56 km) |
| Westerlo to Oberwingert | 301.31 mi (484.91 km) |
| Westerlo to Oftringen | 293.32 mi (472.05 km) |
| Westerlo to Olten | 290.91 mi (468.18 km) |
| Westerlo to Onex | 342.83 mi (551.73 km) |
| Westerlo to Opfikon | 301.06 mi (484.51 km) |
| Westerlo to Ostermundigen | 308.09 mi (495.82 km) |
| Westerlo to Payerne | 308.64 mi (496.70 km) |
| Westerlo to Pfaffikon | 310.36 mi (499.48 km) |
| Westerlo to Plan-les-Ouates | 344.08 mi (553.75 km) |
| Westerlo to Pratteln | 276.45 mi (444.91 km) |
| Westerlo to Prilly | 323.55 mi (520.70 km) |
| Westerlo to Pully | 325.39 mi (523.67 km) |
