| Williamstown to Idar-Oberstein | 3,894.61 mi (6,267.76 km) |
| Williamstown to Idstein | 3,919.50 mi (6,307.82 km) |
| Williamstown to Illertissen | 4,052.06 mi (6,521.16 km) |
| Williamstown to Illingen | 3,893.21 mi (6,265.51 km) |
| Williamstown to Ilmenau | 4,011.99 mi (6,456.68 km) |
| Williamstown to Ilsede | 3,937.71 mi (6,337.14 km) |
| Williamstown to Ilsenburg | 3,968.40 mi (6,386.52 km) |
| Williamstown to Ilsfeld | 3,992.83 mi (6,425.84 km) |
| Williamstown to Ilvesheim | 3,952.63 mi (6,361.14 km) |
| Williamstown to Immenstadt im Allgau | 4,077.53 mi (6,562.14 km) |
| Williamstown to Ingelheim | 3,917.57 mi (6,304.71 km) |
| Williamstown to Ingolstadt | 4,090.34 mi (6,582.76 km) |
| Williamstown to Iserlohn | 3,863.25 mi (6,217.31 km) |
| Williamstown to Isernhagen-Sud | 3,920.46 mi (6,309.37 km) |
| Williamstown to Ismaning | 4,117.18 mi (6,625.96 km) |
