| Irthlingborough to Krosno Odrzanskie | 664.77 mi (1,069.84 km) |
| Irthlingborough to Krotoszyn | 766.91 mi (1,234.23 km) |
| Irthlingborough to Kruszwica | 794.84 mi (1,279.17 km) |
| Irthlingborough to Krynica | 957.98 mi (1,541.72 km) |
| Irthlingborough to Krzeszowice | 885.99 mi (1,425.86 km) |
| Irthlingborough to Kudowa-Zdroj | 736.60 mi (1,185.45 km) |
| Irthlingborough to Kutno | 841.98 mi (1,355.03 km) |
| Irthlingborough to Kwidzyn | 815.34 mi (1,312.17 km) |
| Irthlingborough to Lancut | 997.16 mi (1,604.78 km) |
| Irthlingborough to Lapy | 981.51 mi (1,579.59 km) |
| Irthlingborough to Lask | 839.72 mi (1,351.40 km) |
| Irthlingborough to Laziska Gorne | 852.58 mi (1,372.09 km) |
| Irthlingborough to Lebork | 768.99 mi (1,237.57 km) |
| Irthlingborough to Leczna | 1,001.78 mi (1,612.21 km) |
| Irthlingborough to Leczyca | 836.91 mi (1,346.88 km) |
