| Irthlingborough to Kidderminster | 69.14 mi (111.27 km) |
| Irthlingborough to Kidlington | 45.00 mi (72.42 km) |
| Irthlingborough to Kidsgrove | 86.37 mi (139.00 km) |
| Irthlingborough to Killamarsh | 74.76 mi (120.31 km) |
| Irthlingborough to Killingworth | 191.01 mi (307.41 km) |
| Irthlingborough to Kilmarnock | 276.44 mi (444.89 km) |
| Irthlingborough to Kilsyth | 288.45 mi (464.22 km) |
| Irthlingborough to Kilwinning | 283.73 mi (456.61 km) |
| Irthlingborough to King's Lynn | 51.88 mi (83.49 km) |
| Irthlingborough to Kings Norton | 55.70 mi (89.64 km) |
| Irthlingborough to Kingsnorth | 104.56 mi (168.28 km) |
| Irthlingborough to Kingsteignton | 177.72 mi (286.02 km) |
| Irthlingborough to Kingston upon Hull | 98.83 mi (159.06 km) |
| Irthlingborough to Kingston upon Thames | 64.54 mi (103.87 km) |
| Irthlingborough to Kingswinford | 66.49 mi (107.01 km) |
