| Castleford to Oswego (Illinois) | 3,868.53 mi (6,225.79 km) |
| Castleford to Oswego (New York) | 3,340.92 mi (5,376.70 km) |
| Castleford to Otsego (Minnesota) | 3,883.60 mi (6,250.04 km) |
| Castleford to Ottawa (Illinois) | 3,902.44 mi (6,280.37 km) |
| Castleford to Ottawa (Kansas) | 4,275.21 mi (6,880.29 km) |
| Castleford to Ottumwa (Iowa) | 4,049.97 mi (6,517.80 km) |
| Castleford to Overland (Missouri) | 4,090.87 mi (6,583.62 km) |
| Castleford to Overland Park (Kansas) | 4,239.63 mi (6,823.03 km) |
| Castleford to Overlea (Maryland) | 3,528.27 mi (5,678.20 km) |
| Castleford to Oviedo (Florida) | 4,244.24 mi (6,830.45 km) |
| Castleford to Owasso (Oklahoma) | 4,415.41 mi (7,105.92 km) |
| Castleford to Owatonna (Minnesota) | 3,927.29 mi (6,320.36 km) |
| Castleford to Owensboro (Kentucky) | 4,015.57 mi (6,462.44 km) |
| Castleford to Owings Mills (Maryland) | 3,536.81 mi (5,691.94 km) |
| Castleford to Owosso (Michigan) | 3,652.06 mi (5,877.42 km) |
