| Holbrook to Idar-Oberstein | 3,768.26 mi (6,064.42 km) |
| Holbrook to Idstein | 3,793.22 mi (6,104.60 km) |
| Holbrook to Illertissen | 3,925.66 mi (6,317.75 km) |
| Holbrook to Illingen | 3,766.83 mi (6,062.12 km) |
| Holbrook to Ilmenau | 3,885.89 mi (6,253.74 km) |
| Holbrook to Ilsede | 3,811.89 mi (6,134.65 km) |
| Holbrook to Ilsenburg | 3,842.52 mi (6,183.93 km) |
| Holbrook to Ilsfeld | 3,866.47 mi (6,222.48 km) |
| Holbrook to Ilvesheim | 3,826.29 mi (6,157.82 km) |
| Holbrook to Immenstadt im Allgau | 3,951.11 mi (6,358.70 km) |
| Holbrook to Ingelheim | 3,791.26 mi (6,101.44 km) |
| Holbrook to Ingolstadt | 3,964.01 mi (6,379.46 km) |
| Holbrook to Iserlohn | 3,737.12 mi (6,014.31 km) |
| Holbrook to Isernhagen-Sud | 3,794.65 mi (6,106.91 km) |
| Holbrook to Ismaning | 3,990.82 mi (6,422.60 km) |
