| Watertown Town to Idar-Oberstein | 3,624.29 mi (5,832.73 km) |
| Watertown Town to Idstein | 3,648.86 mi (5,872.27 km) |
| Watertown Town to Illertissen | 3,782.03 mi (6,086.60 km) |
| Watertown Town to Illingen | 3,623.08 mi (5,830.78 km) |
| Watertown Town to Ilmenau | 3,741.00 mi (6,020.56 km) |
| Watertown Town to Ilsede | 3,666.50 mi (5,900.66 km) |
| Watertown Town to Ilsenburg | 3,697.21 mi (5,950.09 km) |
| Watertown Town to Ilsfeld | 3,722.54 mi (5,990.86 km) |
| Watertown Town to Ilvesheim | 3,682.25 mi (5,926.02 km) |
| Watertown Town to Immenstadt im Allgau | 3,807.81 mi (6,128.08 km) |
| Watertown Town to Ingelheim | 3,647.05 mi (5,869.36 km) |
| Watertown Town to Ingolstadt | 3,819.89 mi (6,147.51 km) |
| Watertown Town to Iserlohn | 3,592.31 mi (5,781.27 km) |
| Watertown Town to Isernhagen-Sud | 3,649.24 mi (5,872.88 km) |
| Watertown Town to Ismaning | 3,846.91 mi (6,191.01 km) |
