| Castel Gandolfo to Isny im Allgau | 430.25 mi (692.42 km) |
| Castel Gandolfo to Isselburg | 755.15 mi (1,215.29 km) |
| Castel Gandolfo to Issum | 737.60 mi (1,187.05 km) |
| Castel Gandolfo to Itzehoe | 853.68 mi (1,373.86 km) |
| Castel Gandolfo to Jena | 636.31 mi (1,024.05 km) |
| Castel Gandolfo to Jever | 846.10 mi (1,361.66 km) |
| Castel Gandolfo to Jork | 825.90 mi (1,329.16 km) |
| Castel Gandolfo to Juchen | 708.98 mi (1,140.99 km) |
| Castel Gandolfo to Julich | 700.83 mi (1,127.88 km) |
| Castel Gandolfo to Juterbog | 708.23 mi (1,139.79 km) |
| Castel Gandolfo to Kaarst | 713.93 mi (1,148.96 km) |
| Castel Gandolfo to Kaiserslautern | 581.59 mi (935.98 km) |
| Castel Gandolfo to Kalkar | 752.48 mi (1,211.00 km) |
| Castel Gandolfo to Kall | 674.16 mi (1,084.95 km) |
| Castel Gandolfo to Kaltenkirchen | 844.66 mi (1,359.35 km) |
