| Gaithersburg to Idar-Oberstein | 4,010.39 mi (6,454.10 km) |
| Gaithersburg to Idstein | 4,034.56 mi (6,492.99 km) |
| Gaithersburg to Illertissen | 4,168.40 mi (6,708.39 km) |
| Gaithersburg to Illingen | 4,009.36 mi (6,452.45 km) |
| Gaithersburg to Ilmenau | 4,125.88 mi (6,639.96 km) |
| Gaithersburg to Ilsede | 4,050.23 mi (6,518.22 km) |
| Gaithersburg to Ilsenburg | 4,081.18 mi (6,568.03 km) |
| Gaithersburg to Ilsfeld | 4,108.68 mi (6,612.29 km) |
| Gaithersburg to Ilvesheim | 4,068.30 mi (6,547.29 km) |
| Gaithersburg to Immenstadt im Allgau | 4,194.37 mi (6,750.18 km) |
| Gaithersburg to Ingelheim | 4,032.91 mi (6,490.35 km) |
| Gaithersburg to Ingolstadt | 4,205.83 mi (6,768.62 km) |
| Gaithersburg to Iserlohn | 3,977.36 mi (6,400.95 km) |
| Gaithersburg to Isernhagen-Sud | 4,032.90 mi (6,490.32 km) |
| Gaithersburg to Ismaning | 4,233.06 mi (6,812.45 km) |
