| Castricum to Orthez | 674.18 mi (1,085.00 km) |
| Castricum to Orvault | 459.32 mi (739.20 km) |
| Castricum to Osny | 266.61 mi (429.06 km) |
| Castricum to Ostwald | 306.91 mi (493.92 km) |
| Castricum to Ouistreham | 311.47 mi (501.26 km) |
| Castricum to Oullins | 472.30 mi (760.09 km) |
| Castricum to Outreau | 183.38 mi (295.13 km) |
| Castricum to Oyonnax | 437.12 mi (703.48 km) |
| Castricum to Ozoir-la-Ferriere | 274.73 mi (442.14 km) |
| Castricum to Pace | 415.79 mi (669.16 km) |
| Castricum to Palaiseau | 285.42 mi (459.33 km) |
| Castricum to Pamiers | 666.87 mi (1,073.22 km) |
| Castricum to Panazol | 487.69 mi (784.87 km) |
| Castricum to Pantin | 271.14 mi (436.35 km) |
| Castricum to Paray-le-Monial | 422.10 mi (679.31 km) |
