| Kastamonu to Nyon | 1,406.83 mi (2,264.08 km) |
| Kastamonu to Oberriet | 1,258.56 mi (2,025.46 km) |
| Kastamonu to Obersiggenthal | 1,319.29 mi (2,123.19 km) |
| Kastamonu to Oberwil | 1,353.58 mi (2,178.38 km) |
| Kastamonu to Oberwingert | 1,297.68 mi (2,088.42 km) |
| Kastamonu to Oftringen | 1,334.83 mi (2,148.21 km) |
| Kastamonu to Olten | 1,335.94 mi (2,150.00 km) |
| Kastamonu to Onex | 1,412.24 mi (2,272.78 km) |
| Kastamonu to Opfikon | 1,306.03 mi (2,101.85 km) |
| Kastamonu to Ostermundigen | 1,351.40 mi (2,174.88 km) |
| Kastamonu to Payerne | 1,376.42 mi (2,215.13 km) |
| Kastamonu to Pfaffikon | 1,295.28 mi (2,084.56 km) |
| Kastamonu to Plan-les-Ouates | 1,411.37 mi (2,271.38 km) |
| Kastamonu to Pratteln | 1,346.91 mi (2,167.64 km) |
| Kastamonu to Prilly | 1,390.27 mi (2,237.42 km) |
