| Southborough to Idar-Oberstein | 325.76 mi (524.26 km) |
| Southborough to Idstein | 356.33 mi (573.46 km) |
| Southborough to Illertissen | 483.18 mi (777.60 km) |
| Southborough to Illingen | 323.94 mi (521.33 km) |
| Southborough to Ilmenau | 464.80 mi (748.02 km) |
| Southborough to Ilsede | 431.07 mi (693.74 km) |
| Southborough to Ilsenburg | 450.23 mi (724.58 km) |
| Southborough to Ilsfeld | 423.67 mi (681.84 km) |
| Southborough to Ilvesheim | 384.15 mi (618.23 km) |
| Southborough to Immenstadt im Allgau | 511.40 mi (823.02 km) |
| Southborough to Ingelheim | 351.41 mi (565.54 km) |
| Southborough to Ingolstadt | 522.32 mi (840.60 km) |
| Southborough to Iserlohn | 320.18 mi (515.28 km) |
| Southborough to Isernhagen-Sud | 418.89 mi (674.13 km) |
| Southborough to Ismaning | 547.94 mi (881.82 km) |
