| Irthlingborough to Ivybridge | 195.50 mi (314.62 km) |
| Irthlingborough to Jarrow | 187.08 mi (301.07 km) |
| Irthlingborough to Johnstone | 289.18 mi (465.38 km) |
| Irthlingborough to Kearsley | 110.87 mi (178.42 km) |
| Irthlingborough to Keighley | 119.42 mi (192.18 km) |
| Irthlingborough to Kempston | 15.33 mi (24.67 km) |
| Irthlingborough to Kendal | 163.90 mi (263.76 km) |
| Irthlingborough to Kenilworth | 40.21 mi (64.71 km) |
| Irthlingborough to Kenley | 72.52 mi (116.71 km) |
| Irthlingborough to Kensington | 59.73 mi (96.13 km) |
| Irthlingborough to Kenton | 52.50 mi (84.49 km) |
| Irthlingborough to Kettering | 6.63 mi (10.66 km) |
| Irthlingborough to Kew Green | 57.26 mi (92.15 km) |
| Irthlingborough to Keynsham | 102.02 mi (164.19 km) |
| Irthlingborough to Kidbrooke | 65.53 mi (105.46 km) |
