| Castricum to Oberriet | 421.96 mi (679.09 km) |
| Castricum to Obersiggenthal | 384.95 mi (619.52 km) |
| Castricum to Oberwil | 370.76 mi (596.69 km) |
| Castricum to Oberwingert | 392.37 mi (631.46 km) |
| Castricum to Oftringen | 389.30 mi (626.52 km) |
| Castricum to Olten | 386.87 mi (622.61 km) |
| Castricum to Onex | 444.57 mi (715.47 km) |
| Castricum to Opfikon | 393.55 mi (633.36 km) |
| Castricum to Ostermundigen | 406.51 mi (654.22 km) |
| Castricum to Payerne | 408.83 mi (657.95 km) |
| Castricum to Pfaffikon | 402.01 mi (646.98 km) |
| Castricum to Plan-les-Ouates | 445.82 mi (717.48 km) |
| Castricum to Pratteln | 372.83 mi (600.01 km) |
| Castricum to Prilly | 424.61 mi (683.35 km) |
| Castricum to Pully | 426.35 mi (686.15 km) |
