| Gloucester to Idar-Oberstein | 442.78 mi (712.59 km) |
| Gloucester to Idstein | 470.39 mi (757.02 km) |
| Gloucester to Illertissen | 601.30 mi (967.70 km) |
| Gloucester to Illingen | 441.91 mi (711.18 km) |
| Gloucester to Ilmenau | 574.00 mi (923.77 km) |
| Gloucester to Ilsede | 527.96 mi (849.67 km) |
| Gloucester to Ilsenburg | 550.84 mi (886.50 km) |
| Gloucester to Ilsfeld | 541.00 mi (870.65 km) |
| Gloucester to Ilvesheim | 500.91 mi (806.14 km) |
| Gloucester to Immenstadt im Allgau | 629.78 mi (1,013.53 km) |
| Gloucester to Ingelheim | 466.83 mi (751.29 km) |
| Gloucester to Ingolstadt | 638.88 mi (1,028.18 km) |
| Gloucester to Iserlohn | 426.10 mi (685.74 km) |
| Gloucester to Isernhagen-Sud | 513.96 mi (827.14 km) |
| Gloucester to Ismaning | 665.36 mi (1,070.80 km) |
