| Thornton Heath to Idar-Oberstein | 345.87 mi (556.62 km) |
| Thornton Heath to Idstein | 374.73 mi (603.06 km) |
| Thornton Heath to Illertissen | 504.29 mi (811.58 km) |
| Thornton Heath to Illingen | 344.87 mi (555.02 km) |
| Thornton Heath to Ilmenau | 481.17 mi (774.37 km) |
| Thornton Heath to Ilsede | 443.10 mi (713.10 km) |
| Thornton Heath to Ilsenburg | 463.51 mi (745.95 km) |
| Thornton Heath to Ilsfeld | 444.02 mi (714.58 km) |
| Thornton Heath to Ilvesheim | 404.08 mi (650.31 km) |
| Thornton Heath to Immenstadt im Allgau | 533.13 mi (857.98 km) |
| Thornton Heath to Ingelheim | 370.51 mi (596.29 km) |
| Thornton Heath to Ingolstadt | 542.15 mi (872.51 km) |
| Thornton Heath to Iserlohn | 335.07 mi (539.24 km) |
| Thornton Heath to Isernhagen-Sud | 430.32 mi (692.53 km) |
| Thornton Heath to Ismaning | 568.37 mi (914.70 km) |
