| Willoughby to Idar-Oberstein | 4,064.30 mi (6,540.85 km) |
| Willoughby to Idstein | 4,084.32 mi (6,573.08 km) |
| Willoughby to Illertissen | 4,224.89 mi (6,799.30 km) |
| Willoughby to Illingen | 4,065.38 mi (6,542.60 km) |
| Willoughby to Ilmenau | 4,168.93 mi (6,709.24 km) |
| Willoughby to Ilsede | 4,086.61 mi (6,576.76 km) |
| Willoughby to Ilsenburg | 4,118.77 mi (6,628.52 km) |
| Willoughby to Ilsfeld | 4,162.60 mi (6,699.06 km) |
| Willoughby to Ilvesheim | 4,121.30 mi (6,632.59 km) |
| Willoughby to Immenstadt im Allgau | 4,253.72 mi (6,845.71 km) |
| Willoughby to Ingelheim | 4,084.27 mi (6,572.99 km) |
| Willoughby to Ingolstadt | 4,257.30 mi (6,851.47 km) |
| Willoughby to Iserlohn | 4,022.20 mi (6,473.11 km) |
| Willoughby to Isernhagen-Sud | 4,068.94 mi (6,548.32 km) |
| Willoughby to Ismaning | 4,286.64 mi (6,898.67 km) |
