| Romanshorn to Krosno Odrzanskie | 400.98 mi (645.32 km) |
| Romanshorn to Krotoszyn | 459.68 mi (739.78 km) |
| Romanshorn to Kruszwica | 531.13 mi (854.77 km) |
| Romanshorn to Krynica | 545.68 mi (878.18 km) |
| Romanshorn to Krzeszowice | 499.35 mi (803.62 km) |
| Romanshorn to Kudowa-Zdroj | 369.63 mi (594.86 km) |
| Romanshorn to Kutno | 549.29 mi (884.00 km) |
| Romanshorn to Kwidzyn | 597.19 mi (961.08 km) |
| Romanshorn to Lancut | 609.97 mi (981.65 km) |
| Romanshorn to Lapy | 703.31 mi (1,131.86 km) |
| Romanshorn to Lask | 518.27 mi (834.07 km) |
| Romanshorn to Laziska Gorne | 466.69 mi (751.06 km) |
| Romanshorn to Lebork | 604.01 mi (972.06 km) |
| Romanshorn to Leczna | 659.13 mi (1,060.77 km) |
| Romanshorn to Leczyca | 536.62 mi (863.61 km) |
