| Kastamonu to Krosno Odrzanskie | 1,145.27 mi (1,843.14 km) |
| Kastamonu to Krotoszyn | 1,049.49 mi (1,688.99 km) |
| Kastamonu to Kruszwica | 1,062.82 mi (1,710.44 km) |
| Kastamonu to Krynica | 831.75 mi (1,338.57 km) |
| Kastamonu to Krzeszowice | 908.83 mi (1,462.62 km) |
| Kastamonu to Kudowa-Zdroj | 1,045.84 mi (1,683.11 km) |
| Kastamonu to Kutno | 1,009.80 mi (1,625.12 km) |
| Kastamonu to Kwidzyn | 1,094.72 mi (1,761.78 km) |
| Kastamonu to Lancut | 817.04 mi (1,314.90 km) |
| Kastamonu to Lapy | 948.89 mi (1,527.09 km) |
| Kastamonu to Lask | 988.12 mi (1,590.23 km) |
| Kastamonu to Laziska Gorne | 937.76 mi (1,509.18 km) |
| Kastamonu to Lebork | 1,168.28 mi (1,880.17 km) |
| Kastamonu to Leczna | 858.37 mi (1,381.41 km) |
| Kastamonu to Leczyca | 1,006.63 mi (1,620.01 km) |
