| Sonderborg to Idstein | 330.45 mi (531.82 km) |
| Sonderborg to Illertissen | 462.89 mi (744.95 km) |
| Sonderborg to Illingen | 399.76 mi (643.36 km) |
| Sonderborg to Ilmenau | 296.02 mi (476.39 km) |
| Sonderborg to Ilsede | 183.60 mi (295.47 km) |
| Sonderborg to Ilsenburg | 213.71 mi (343.93 km) |
| Sonderborg to Ilsfeld | 405.80 mi (653.08 km) |
| Sonderborg to Ilvesheim | 379.50 mi (610.75 km) |
| Sonderborg to Immenstadt im Allgau | 507.96 mi (817.49 km) |
| Sonderborg to Ingelheim | 348.97 mi (561.62 km) |
| Sonderborg to Ingolstadt | 430.62 mi (693.01 km) |
| Sonderborg to Iserlohn | 259.32 mi (417.33 km) |
| Sonderborg to Isernhagen-Sud | 171.34 mi (275.75 km) |
| Sonderborg to Ismaning | 469.01 mi (754.80 km) |
| Sonderborg to Isny im Allgau | 499.10 mi (803.22 km) |
