| Castel Bolognese to Kamen | 537.61 mi (865.20 km) |
| Castel Bolognese to Kamenz | 491.86 mi (791.57 km) |
| Castel Bolognese to Kamp-Lintfort | 552.67 mi (889.43 km) |
| Castel Bolognese to Kandel | 370.79 mi (596.73 km) |
| Castel Bolognese to Kappeln | 719.59 mi (1,158.06 km) |
| Castel Bolognese to Karben | 432.63 mi (696.26 km) |
| Castel Bolognese to Karlsdorf-Neuthard | 366.90 mi (590.46 km) |
| Castel Bolognese to Karlsfeld | 269.93 mi (434.42 km) |
| Castel Bolognese to Karlsruhe | 361.92 mi (582.45 km) |
| Castel Bolognese to Kassel | 495.18 mi (796.91 km) |
| Castel Bolognese to Kaufbeuren | 252.57 mi (406.48 km) |
| Castel Bolognese to Kaufering | 263.91 mi (424.72 km) |
| Castel Bolognese to Kaufungen | 491.67 mi (791.26 km) |
| Castel Bolognese to Kehl | 349.45 mi (562.39 km) |
| Castel Bolognese to Kelheim | 317.84 mi (511.52 km) |
