| Castleford to Nuth | 361.54 mi (581.84 km) |
| Castleford to Oegstgeest | 264.42 mi (425.54 km) |
| Castleford to Oirschot | 318.31 mi (512.27 km) |
| Castleford to Oisterwijk | 311.66 mi (501.57 km) |
| Castleford to Oldebroek | 313.42 mi (504.40 km) |
| Castleford to Oldenzaal | 357.62 mi (575.54 km) |
| Castleford to Ommen | 332.62 mi (535.30 km) |
| Castleford to Oosterend | 309.84 mi (498.64 km) |
| Castleford to Oosterhout | 296.91 mi (477.84 km) |
| Castleford to Oosterwolde | 319.18 mi (513.67 km) |
| Castleford to Oostzaan | 273.62 mi (440.36 km) |
| Castleford to Opmeer | 270.12 mi (434.72 km) |
| Castleford to Oss | 317.29 mi (510.64 km) |
| Castleford to Oud-Beijerland | 273.98 mi (440.92 km) |
| Castleford to Oudenbosch | 286.81 mi (461.57 km) |
