| Houghton Regis to Idar-Oberstein | 373.99 mi (601.88 km) |
| Houghton Regis to Idstein | 399.10 mi (642.28 km) |
| Houghton Regis to Illertissen | 534.35 mi (859.95 km) |
| Houghton Regis to Illingen | 374.89 mi (603.32 km) |
| Houghton Regis to Ilmenau | 501.04 mi (806.34 km) |
| Houghton Regis to Ilsede | 454.90 mi (732.10 km) |
| Houghton Regis to Ilsenburg | 477.52 mi (768.50 km) |
| Houghton Regis to Ilsfeld | 472.37 mi (760.21 km) |
| Houghton Regis to Ilvesheim | 431.62 mi (694.62 km) |
| Houghton Regis to Immenstadt im Allgau | 564.74 mi (908.85 km) |
| Houghton Regis to Ingelheim | 396.39 mi (637.92 km) |
| Houghton Regis to Ingolstadt | 569.10 mi (915.88 km) |
| Houghton Regis to Iserlohn | 352.86 mi (567.87 km) |
| Houghton Regis to Isernhagen-Sud | 441.10 mi (709.87 km) |
| Houghton Regis to Ismaning | 596.68 mi (960.27 km) |
