| Letchworth to Idar-Oberstein | 364.21 mi (586.14 km) |
| Letchworth to Idstein | 388.18 mi (624.71 km) |
| Letchworth to Illertissen | 525.13 mi (845.11 km) |
| Letchworth to Illingen | 365.79 mi (588.68 km) |
| Letchworth to Ilmenau | 489.05 mi (787.05 km) |
| Letchworth to Ilsede | 441.82 mi (711.04 km) |
| Letchworth to Ilsenburg | 464.66 mi (747.80 km) |
| Letchworth to Ilsfeld | 462.57 mi (744.43 km) |
| Letchworth to Ilvesheim | 421.58 mi (678.47 km) |
| Letchworth to Immenstadt im Allgau | 556.14 mi (895.02 km) |
| Letchworth to Ingelheim | 385.88 mi (621.01 km) |
| Letchworth to Ingolstadt | 558.78 mi (899.28 km) |
| Letchworth to Iserlohn | 340.62 mi (548.17 km) |
| Letchworth to Isernhagen-Sud | 427.92 mi (688.68 km) |
| Letchworth to Ismaning | 586.79 mi (944.35 km) |
