| Towcester to Idar-Oberstein | 398.08 mi (640.65 km) |
| Towcester to Idstein | 422.08 mi (679.27 km) |
| Towcester to Illertissen | 558.82 mi (899.34 km) |
| Towcester to Illingen | 399.42 mi (642.81 km) |
| Towcester to Ilmenau | 522.29 mi (840.55 km) |
| Towcester to Ilsede | 472.81 mi (760.91 km) |
| Towcester to Ilsenburg | 496.38 mi (798.84 km) |
| Towcester to Ilsfeld | 496.45 mi (798.96 km) |
| Towcester to Ilvesheim | 455.51 mi (733.07 km) |
| Towcester to Immenstadt im Allgau | 589.53 mi (948.75 km) |
| Towcester to Ingelheim | 419.83 mi (675.65 km) |
| Towcester to Ingolstadt | 592.74 mi (953.92 km) |
| Towcester to Iserlohn | 373.58 mi (601.23 km) |
| Towcester to Isernhagen-Sud | 458.56 mi (737.97 km) |
| Towcester to Ismaning | 620.70 mi (998.91 km) |
