| Viersen to Oberriet | 307.33 mi (494.60 km) |
| Viersen to Obersiggenthal | 274.00 mi (440.96 km) |
| Viersen to Oberwil | 263.77 mi (424.49 km) |
| Viersen to Oberwingert | 279.47 mi (449.76 km) |
| Viersen to Oftringen | 280.65 mi (451.67 km) |
| Viersen to Olten | 278.23 mi (447.77 km) |
| Viersen to Onex | 350.76 mi (564.49 km) |
| Viersen to Opfikon | 281.57 mi (453.15 km) |
| Viersen to Ostermundigen | 301.25 mi (484.81 km) |
| Viersen to Payerne | 307.69 mi (495.18 km) |
| Viersen to Pfaffikon | 289.39 mi (465.73 km) |
| Viersen to Plan-les-Ouates | 351.88 mi (566.29 km) |
| Viersen to Pratteln | 264.92 mi (426.34 km) |
| Viersen to Prilly | 326.44 mi (525.36 km) |
| Viersen to Pully | 327.69 mi (527.36 km) |
