| Port Huron to Idar-Oberstein | 4,043.81 mi (6,507.88 km) |
| Port Huron to Idstein | 4,062.23 mi (6,537.53 km) |
| Port Huron to Illertissen | 4,205.11 mi (6,767.47 km) |
| Port Huron to Illingen | 4,045.69 mi (6,510.91 km) |
| Port Huron to Ilmenau | 4,144.19 mi (6,669.43 km) |
| Port Huron to Ilsede | 4,059.53 mi (6,533.19 km) |
| Port Huron to Ilsenburg | 4,092.09 mi (6,585.57 km) |
| Port Huron to Ilsfeld | 4,141.95 mi (6,665.82 km) |
| Port Huron to Ilvesheim | 4,100.37 mi (6,598.91 km) |
| Port Huron to Immenstadt im Allgau | 4,234.98 mi (6,815.55 km) |
| Port Huron to Ingelheim | 4,062.78 mi (6,538.42 km) |
| Port Huron to Ingolstadt | 4,235.57 mi (6,816.50 km) |
| Port Huron to Iserlohn | 3,998.38 mi (6,434.77 km) |
| Port Huron to Isernhagen-Sud | 4,041.77 mi (6,504.60 km) |
| Port Huron to Ismaning | 4,265.65 mi (6,864.90 km) |
