| Boulder City to Idar-Oberstein | 5,554.13 mi (8,938.50 km) |
| Boulder City to Idstein | 5,558.26 mi (8,945.16 km) |
| Boulder City to Illertissen | 5,715.35 mi (9,197.97 km) |
| Boulder City to Illingen | 5,562.60 mi (8,952.15 km) |
| Boulder City to Ilmenau | 5,613.41 mi (9,033.91 km) |
| Boulder City to Ilsede | 5,510.96 mi (8,869.03 km) |
| Boulder City to Ilsenburg | 5,545.70 mi (8,924.94 km) |
| Boulder City to Ilsfeld | 5,647.17 mi (9,088.24 km) |
| Boulder City to Ilvesheim | 5,604.83 mi (9,020.11 km) |
| Boulder City to Immenstadt im Allgau | 5,752.89 mi (9,258.38 km) |
| Boulder City to Ingelheim | 5,563.93 mi (8,954.29 km) |
| Boulder City to Ingolstadt | 5,727.89 mi (9,218.15 km) |
| Boulder City to Iserlohn | 5,481.88 mi (8,822.24 km) |
| Boulder City to Isernhagen-Sud | 5,493.13 mi (8,840.34 km) |
| Boulder City to Ismaning | 5,763.30 mi (9,275.14 km) |
