| Watertown to Idar-Oberstein | 3,746.86 mi (6,029.99 km) |
| Watertown to Idstein | 3,767.73 mi (6,063.58 km) |
| Watertown to Illertissen | 3,907.04 mi (6,287.78 km) |
| Watertown to Illingen | 3,747.54 mi (6,031.09 km) |
| Watertown to Ilmenau | 3,853.91 mi (6,202.26 km) |
| Watertown to Ilsede | 3,773.23 mi (6,072.42 km) |
| Watertown to Ilsenburg | 3,805.09 mi (6,123.70 km) |
| Watertown to Ilsfeld | 3,845.21 mi (6,188.27 km) |
| Watertown to Ilvesheim | 3,804.07 mi (6,122.06 km) |
| Watertown to Immenstadt im Allgau | 3,935.38 mi (6,333.38 km) |
| Watertown to Ingelheim | 3,767.35 mi (6,062.96 km) |
| Watertown to Ingolstadt | 3,940.45 mi (6,341.54 km) |
| Watertown to Iserlohn | 3,706.67 mi (5,965.31 km) |
| Watertown to Isernhagen-Sud | 3,755.63 mi (6,044.11 km) |
| Watertown to Ismaning | 3,969.37 mi (6,388.09 km) |
