| Harmanli to Idstein | 1,016.54 mi (1,635.96 km) |
| Harmanli to Illertissen | 883.04 mi (1,421.11 km) |
| Harmanli to Illingen | 1,041.32 mi (1,675.84 km) |
| Harmanli to Ilmenau | 933.26 mi (1,501.94 km) |
| Harmanli to Ilsede | 1,023.57 mi (1,647.28 km) |
| Harmanli to Ilsenburg | 989.83 mi (1,592.98 km) |
| Harmanli to Ilsfeld | 941.48 mi (1,515.16 km) |
| Harmanli to Ilvesheim | 981.78 mi (1,580.03 km) |
| Harmanli to Immenstadt im Allgau | 860.24 mi (1,384.42 km) |
| Harmanli to Ingelheim | 1,017.46 mi (1,637.45 km) |
| Harmanli to Ingolstadt | 844.40 mi (1,358.93 km) |
| Harmanli to Iserlohn | 1,078.52 mi (1,735.71 km) |
| Harmanli to Isernhagen-Sud | 1,041.54 mi (1,676.20 km) |
| Harmanli to Ismaning | 817.12 mi (1,315.04 km) |
| Harmanli to Isny im Allgau | 871.07 mi (1,401.84 km) |
