| Castleford to Indianola (Iowa) | 4,074.07 mi (6,556.58 km) |
| Castleford to Indio (California) | 5,256.41 mi (8,459.37 km) |
| Castleford to Inglewood (California) | 5,309.84 mi (8,545.36 km) |
| Castleford to Inkster (Michigan) | 3,652.70 mi (5,878.46 km) |
| Castleford to Inver Grove Heights (Minnesota) | 3,885.55 mi (6,253.19 km) |
| Castleford to Inwood (New York) | 3,361.28 mi (5,409.46 km) |
| Castleford to Iona (Florida) | 4,386.85 mi (7,059.95 km) |
| Castleford to Ionia (Michigan) | 3,686.22 mi (5,932.40 km) |
| Castleford to Iowa City (Iowa) | 3,986.32 mi (6,415.37 km) |
| Castleford to Irmo (South Carolina) | 3,967.74 mi (6,385.46 km) |
| Castleford to Irondale (Alabama) | 4,210.19 mi (6,775.65 km) |
| Castleford to Ironton (Ohio) | 3,807.70 mi (6,127.90 km) |
| Castleford to Irvine (California) | 5,308.27 mi (8,542.83 km) |
| Castleford to Irving (Texas) | 4,637.88 mi (7,463.94 km) |
| Castleford to Isabela (Puerto Rico) | 4,204.70 mi (6,766.82 km) |
