| Castleford to Ifield | 185.55 mi (298.61 km) |
| Castleford to Ilford | 160.92 mi (258.97 km) |
| Castleford to Ilfracombe | 208.69 mi (335.86 km) |
| Castleford to Ilkeston | 51.51 mi (82.90 km) |
| Castleford to Ilkley | 23.87 mi (38.42 km) |
| Castleford to Immingham | 47.11 mi (75.81 km) |
| Castleford to Ince-in-Makerfield | 52.36 mi (84.26 km) |
| Castleford to Inverness | 282.95 mi (455.37 km) |
| Castleford to Inverurie | 249.48 mi (401.50 km) |
| Castleford to Ipswich | 155.11 mi (249.62 km) |
| Castleford to Irlam | 47.57 mi (76.55 km) |
| Castleford to Irthlingborough | 101.00 mi (162.54 km) |
| Castleford to Irvine | 186.38 mi (299.95 km) |
| Castleford to Islington | 159.00 mi (255.89 km) |
| Castleford to Iver | 155.78 mi (250.71 km) |
