| Irthlingborough to Kluczbork | 810.17 mi (1,303.84 km) |
| Irthlingborough to Knurow | 844.16 mi (1,358.54 km) |
| Irthlingborough to Kobylka | 917.60 mi (1,476.73 km) |
| Irthlingborough to Kokoszki | 797.98 mi (1,284.23 km) |
| Irthlingborough to Kolbuszowa | 973.66 mi (1,566.96 km) |
| Irthlingborough to Kolno | 939.49 mi (1,511.97 km) |
| Irthlingborough to Kolo | 811.59 mi (1,306.12 km) |
| Irthlingborough to Kolobrzeg | 679.84 mi (1,094.09 km) |
| Irthlingborough to Koluszki | 865.68 mi (1,393.17 km) |
| Irthlingborough to Komorniki | 729.90 mi (1,174.66 km) |
| Irthlingborough to Konin | 796.06 mi (1,281.13 km) |
| Irthlingborough to Konskie | 899.50 mi (1,447.61 km) |
| Irthlingborough to Konstancin-Jeziorna | 916.86 mi (1,475.54 km) |
| Irthlingborough to Konstantynow Lodzki | 846.06 mi (1,361.60 km) |
| Irthlingborough to Koronowo | 775.25 mi (1,247.65 km) |
