| Romanshorn to Jicin | 336.38 mi (541.35 km) |
| Romanshorn to Jihlava | 312.33 mi (502.64 km) |
| Romanshorn to Jindrichuv Hradec | 281.24 mi (452.61 km) |
| Romanshorn to Jirkov | 274.72 mi (442.11 km) |
| Romanshorn to Kadan | 263.17 mi (423.53 km) |
| Romanshorn to Karlovy Vary | 243.80 mi (392.36 km) |
| Romanshorn to Karvina | 447.38 mi (719.99 km) |
| Romanshorn to Kladno | 279.97 mi (450.57 km) |
| Romanshorn to Klasterec nad Ohri | 260.56 mi (419.34 km) |
| Romanshorn to Klatovy | 220.33 mi (354.59 km) |
| Romanshorn to Kolin | 315.70 mi (508.06 km) |
| Romanshorn to Koprivnice | 425.32 mi (684.49 km) |
| Romanshorn to Kralupy nad Vltavou | 291.23 mi (468.68 km) |
| Romanshorn to Kraluv Dvur | 269.35 mi (433.47 km) |
| Romanshorn to Krnov | 417.39 mi (671.73 km) |
