| Portchester to Nyon | 455.38 mi (732.87 km) |
| Portchester to Oberriet | 540.82 mi (870.37 km) |
| Portchester to Obersiggenthal | 483.81 mi (778.61 km) |
| Portchester to Oberwil | 453.89 mi (730.47 km) |
| Portchester to Oberwingert | 501.70 mi (807.41 km) |
| Portchester to Oftringen | 475.53 mi (765.29 km) |
| Portchester to Olten | 473.59 mi (762.17 km) |
| Portchester to Onex | 460.92 mi (741.78 km) |
| Portchester to Opfikon | 496.65 mi (799.28 km) |
| Portchester to Ostermundigen | 473.92 mi (762.69 km) |
| Portchester to Payerne | 459.49 mi (739.48 km) |
| Portchester to Pfaffikon | 507.68 mi (817.03 km) |
| Portchester to Plan-les-Ouates | 462.30 mi (744.00 km) |
| Portchester to Pratteln | 459.43 mi (739.38 km) |
| Portchester to Prilly | 460.69 mi (741.40 km) |
