| Cascais to Idar-Oberstein | 1,120.23 mi (1,802.84 km) |
| Cascais to Idstein | 1,175.48 mi (1,891.75 km) |
| Cascais to Illertissen | 1,173.16 mi (1,888.01 km) |
| Cascais to Illingen | 1,097.13 mi (1,765.66 km) |
| Cascais to Ilmenau | 1,289.88 mi (2,075.87 km) |
| Cascais to Ilsede | 1,326.03 mi (2,134.03 km) |
| Cascais to Ilsenburg | 1,326.78 mi (2,135.25 km) |
| Cascais to Ilsfeld | 1,167.56 mi (1,879.00 km) |
| Cascais to Ilvesheim | 1,156.93 mi (1,861.90 km) |
| Cascais to Immenstadt im Allgau | 1,159.18 mi (1,865.52 km) |
| Cascais to Ingelheim | 1,157.72 mi (1,863.17 km) |
| Cascais to Ingolstadt | 1,244.98 mi (2,003.61 km) |
| Cascais to Iserlohn | 1,203.97 mi (1,937.61 km) |
| Cascais to Isernhagen-Sud | 1,322.22 mi (2,127.90 km) |
| Cascais to Ismaning | 1,239.45 mi (1,994.70 km) |
