| Kastamonu to Orthez | 1,755.13 mi (2,824.61 km) |
| Kastamonu to Orvault | 1,780.15 mi (2,864.87 km) |
| Kastamonu to Osny | 1,618.29 mi (2,604.39 km) |
| Kastamonu to Ostwald | 1,358.91 mi (2,186.95 km) |
| Kastamonu to Ouistreham | 1,724.17 mi (2,774.78 km) |
| Kastamonu to Oullins | 1,472.85 mi (2,370.33 km) |
| Kastamonu to Outreau | 1,656.15 mi (2,665.31 km) |
| Kastamonu to Oyonnax | 1,433.75 mi (2,307.40 km) |
| Kastamonu to Ozoir-la-Ferriere | 1,588.08 mi (2,555.77 km) |
| Kastamonu to Pace | 1,788.20 mi (2,877.82 km) |
| Kastamonu to Palaiseau | 1,607.22 mi (2,586.57 km) |
| Kastamonu to Pamiers | 1,639.45 mi (2,638.44 km) |
| Kastamonu to Panazol | 1,641.45 mi (2,641.66 km) |
| Kastamonu to Pantin | 1,601.65 mi (2,577.60 km) |
| Kastamonu to Paray-le-Monial | 1,507.62 mi (2,426.28 km) |
