| Catonsville to Idar-Oberstein | 3,985.40 mi (6,413.89 km) |
| Catonsville to Idstein | 4,009.71 mi (6,453.01 km) |
| Catonsville to Illertissen | 4,143.30 mi (6,668.00 km) |
| Catonsville to Illingen | 3,984.30 mi (6,412.11 km) |
| Catonsville to Ilmenau | 4,101.27 mi (6,600.35 km) |
| Catonsville to Ilsede | 4,025.90 mi (6,479.05 km) |
| Catonsville to Ilsenburg | 4,056.80 mi (6,528.78 km) |
| Catonsville to Ilsfeld | 4,083.68 mi (6,572.05 km) |
| Catonsville to Ilvesheim | 4,043.33 mi (6,507.11 km) |
| Catonsville to Immenstadt im Allgau | 4,169.17 mi (6,709.63 km) |
| Catonsville to Ingelheim | 4,008.01 mi (6,450.27 km) |
| Catonsville to Ingolstadt | 4,180.90 mi (6,728.51 km) |
| Catonsville to Iserlohn | 3,952.71 mi (6,361.27 km) |
| Catonsville to Isernhagen-Sud | 4,008.57 mi (6,451.18 km) |
| Catonsville to Ismaning | 4,208.05 mi (6,772.21 km) |
