| Romanshorn to Glyka Nera | 985.75 mi (1,586.41 km) |
| Romanshorn to Grevena | 791.51 mi (1,273.81 km) |
| Romanshorn to Ialysos | 1,229.14 mi (1,978.11 km) |
| Romanshorn to Ilion | 978.13 mi (1,574.15 km) |
| Romanshorn to Ilioupoli | 985.04 mi (1,585.27 km) |
| Romanshorn to Ioannina | 791.30 mi (1,273.47 km) |
| Romanshorn to Irakleio | 1,170.70 mi (1,884.06 km) |
| Romanshorn to Irakleio | 979.77 mi (1,576.79 km) |
| Romanshorn to Kaisariani | 983.58 mi (1,582.92 km) |
| Romanshorn to Kalamaria | 827.50 mi (1,331.73 km) |
| Romanshorn to Kalamata | 974.05 mi (1,567.59 km) |
| Romanshorn to Kallithea | 982.34 mi (1,580.92 km) |
| Romanshorn to Kalymnos | 1,155.40 mi (1,859.44 km) |
| Romanshorn to Kalyvia Thorikou | 996.29 mi (1,603.37 km) |
| Romanshorn to Kamatero | 977.25 mi (1,572.72 km) |
