| Romanshorn to Ilawa | 610.78 mi (982.96 km) |
| Romanshorn to Imielin | 481.74 mi (775.28 km) |
| Romanshorn to Inowroclaw | 533.90 mi (859.22 km) |
| Romanshorn to Janow Lubelski | 628.23 mi (1,011.04 km) |
| Romanshorn to Jarocin | 473.48 mi (761.98 km) |
| Romanshorn to Jaroslaw | 628.78 mi (1,011.92 km) |
| Romanshorn to Jasien | 615.18 mi (990.04 km) |
| Romanshorn to Jaslo | 572.46 mi (921.28 km) |
| Romanshorn to Jastrzebie-Zdroj | 451.10 mi (725.97 km) |
| Romanshorn to Jawor | 390.98 mi (629.22 km) |
| Romanshorn to Jaworzno | 485.50 mi (781.34 km) |
| Romanshorn to Jedrzejow | 537.94 mi (865.73 km) |
| Romanshorn to Jelcz-Laskowice | 431.67 mi (694.70 km) |
| Romanshorn to Jelenia Gora | 368.62 mi (593.24 km) |
| Romanshorn to Jozefoslaw | 606.96 mi (976.82 km) |
