| Penafiel to Idar-Oberstein | 954.27 mi (1,535.74 km) |
| Penafiel to Idstein | 1,009.12 mi (1,624.03 km) |
| Penafiel to Illertissen | 1,020.07 mi (1,641.64 km) |
| Penafiel to Illingen | 932.15 mi (1,500.14 km) |
| Penafiel to Ilmenau | 1,125.94 mi (1,812.03 km) |
| Penafiel to Ilsede | 1,155.34 mi (1,859.34 km) |
| Penafiel to Ilsenburg | 1,158.08 mi (1,863.74 km) |
| Penafiel to Ilsfeld | 1,008.38 mi (1,622.83 km) |
| Penafiel to Ilvesheim | 994.40 mi (1,600.34 km) |
| Penafiel to Immenstadt im Allgau | 1,010.32 mi (1,625.96 km) |
| Penafiel to Ingelheim | 992.00 mi (1,596.47 km) |
| Penafiel to Ingolstadt | 1,091.04 mi (1,755.86 km) |
| Penafiel to Iserlohn | 1,032.39 mi (1,661.47 km) |
| Penafiel to Isernhagen-Sud | 1,150.59 mi (1,851.70 km) |
| Penafiel to Ismaning | 1,088.93 mi (1,752.47 km) |
