| Romanshorn to Chojnice | 554.90 mi (893.02 km) |
| Romanshorn to Chojnow | 390.71 mi (628.79 km) |
| Romanshorn to Chorzow | 474.29 mi (763.29 km) |
| Romanshorn to Choszczno | 469.98 mi (756.36 km) |
| Romanshorn to Chrzanow | 489.47 mi (787.73 km) |
| Romanshorn to Ciechanow | 617.60 mi (993.93 km) |
| Romanshorn to Ciechocinek | 554.85 mi (892.95 km) |
| Romanshorn to Cieszyn | 449.19 mi (722.90 km) |
| Romanshorn to Czarna Bialostocka | 728.02 mi (1,171.64 km) |
| Romanshorn to Czarnkow | 486.87 mi (783.53 km) |
| Romanshorn to Czechowice-Dziedzice | 468.31 mi (753.68 km) |
| Romanshorn to Czeladz | 480.60 mi (773.45 km) |
| Romanshorn to Czersk Pomorski | 571.55 mi (919.82 km) |
| Romanshorn to Czestochowa | 493.75 mi (794.62 km) |
| Romanshorn to Czluchow | 548.08 mi (882.06 km) |
