| Castleford to Oerlinghausen | 434.98 mi (700.03 km) |
| Castleford to Oestrich-Winkel | 474.10 mi (762.99 km) |
| Castleford to Offenburg | 541.48 mi (871.42 km) |
| Castleford to Oftersheim | 521.37 mi (839.06 km) |
| Castleford to Ohrdruf | 547.82 mi (881.62 km) |
| Castleford to Ohringen | 561.02 mi (902.87 km) |
| Castleford to Olbernhau | 655.46 mi (1,054.86 km) |
| Castleford to Olching | 668.87 mi (1,076.44 km) |
| Castleford to Oldenburg | 395.63 mi (636.70 km) |
| Castleford to Oldenburg in Holstein | 497.97 mi (801.41 km) |
| Castleford to Olfen | 390.67 mi (628.73 km) |
| Castleford to Olpe | 429.79 mi (691.67 km) |
| Castleford to Olsberg | 444.22 mi (714.90 km) |
| Castleford to Oranienburg | 606.04 mi (975.33 km) |
| Castleford to Ortenberg | 499.06 mi (803.16 km) |
