| Castel Gandolfo to Glyka Nera | 647.30 mi (1,041.73 km) |
| Castel Gandolfo to Grevena | 472.12 mi (759.81 km) |
| Castel Gandolfo to Ialysos | 907.41 mi (1,460.33 km) |
| Castel Gandolfo to Ilion | 638.80 mi (1,028.06 km) |
| Castel Gandolfo to Ilioupoli | 644.40 mi (1,037.06 km) |
| Castel Gandolfo to Ioannina | 452.77 mi (728.67 km) |
| Castel Gandolfo to Irakleio | 805.54 mi (1,296.39 km) |
| Castel Gandolfo to Irakleio | 641.51 mi (1,032.41 km) |
| Castel Gandolfo to Kaisariani | 643.68 mi (1,035.91 km) |
| Castel Gandolfo to Kalamaria | 541.31 mi (871.16 km) |
| Castel Gandolfo to Kalamata | 600.26 mi (966.02 km) |
| Castel Gandolfo to Kallithea | 641.45 mi (1,032.31 km) |
| Castel Gandolfo to Kalymnos | 831.82 mi (1,338.68 km) |
| Castel Gandolfo to Kalyvia Thorikou | 655.66 mi (1,055.18 km) |
| Castel Gandolfo to Kamatero | 638.56 mi (1,027.66 km) |
