| Irthlingborough to Koscian | 729.49 mi (1,174.00 km) |
| Irthlingborough to Koscielisko | 915.99 mi (1,474.14 km) |
| Irthlingborough to Koscierzyna | 776.91 mi (1,250.32 km) |
| Irthlingborough to Kostrzyn | 750.72 mi (1,208.17 km) |
| Irthlingborough to Kostrzyn nad Odra | 642.42 mi (1,033.88 km) |
| Irthlingborough to Koszalin | 704.44 mi (1,133.68 km) |
| Irthlingborough to Kowary | 712.82 mi (1,147.17 km) |
| Irthlingborough to Kozienice | 942.18 mi (1,516.29 km) |
| Irthlingborough to Kozuchow | 688.84 mi (1,108.57 km) |
| Irthlingborough to Kozy | 871.36 mi (1,402.31 km) |
| Irthlingborough to Krakow | 900.33 mi (1,448.94 km) |
| Irthlingborough to Krapkowice | 808.91 mi (1,301.82 km) |
| Irthlingborough to Krasnik | 980.08 mi (1,577.29 km) |
| Irthlingborough to Krasnystaw | 1,019.65 mi (1,640.97 km) |
| Irthlingborough to Krosno | 985.17 mi (1,585.47 km) |
