| Highlands Ranch to Idar-Oberstein | 5,026.55 mi (8,089.45 km) |
| Highlands Ranch to Idstein | 5,034.85 mi (8,102.81 km) |
| Highlands Ranch to Illertissen | 5,188.92 mi (8,350.76 km) |
| Highlands Ranch to Illingen | 5,033.19 mi (8,100.13 km) |
| Highlands Ranch to Ilmenau | 5,098.23 mi (8,204.82 km) |
| Highlands Ranch to Ilsede | 5,000.15 mi (8,046.97 km) |
| Highlands Ranch to Ilsenburg | 5,034.54 mi (8,102.32 km) |
| Highlands Ranch to Ilsfeld | 5,121.73 mi (8,242.62 km) |
| Highlands Ranch to Ilvesheim | 5,079.31 mi (8,174.36 km) |
| Highlands Ranch to Immenstadt im Allgau | 5,224.47 mi (8,407.97 km) |
| Highlands Ranch to Ingelheim | 5,039.08 mi (8,109.61 km) |
| Highlands Ranch to Ingolstadt | 5,206.80 mi (8,379.54 km) |
| Highlands Ranch to Iserlohn | 4,961.52 mi (7,984.79 km) |
| Highlands Ranch to Isernhagen-Sud | 4,982.19 mi (8,018.06 km) |
| Highlands Ranch to Ismaning | 5,240.90 mi (8,434.41 km) |
