| Boppard to Kastoria | 941.15 mi (1,514.64 km) |
| Boppard to Katerini | 996.55 mi (1,603.79 km) |
| Boppard to Keratsini | 1,157.23 mi (1,862.38 km) |
| Boppard to Kerkyra | 946.65 mi (1,523.48 km) |
| Boppard to Kiato | 1,126.28 mi (1,812.57 km) |
| Boppard to Kifisia | 1,157.59 mi (1,862.97 km) |
| Boppard to Kilkis | 973.11 mi (1,566.07 km) |
| Boppard to Komotini | 1,062.71 mi (1,710.26 km) |
| Boppard to Korinthos | 1,136.03 mi (1,828.27 km) |
| Boppard to Koropi | 1,169.45 mi (1,882.06 km) |
| Boppard to Korydallos | 1,157.43 mi (1,862.71 km) |
| Boppard to Kos | 1,342.30 mi (2,160.23 km) |
| Boppard to Kozani | 970.11 mi (1,561.25 km) |
| Boppard to Lagos | 1,049.27 mi (1,688.64 km) |
| Boppard to Lamia | 1,067.00 mi (1,717.17 km) |
