| Gretna to Glyka Nera | 6,098.93 mi (9,815.28 km) |
| Gretna to Grevena | 5,908.29 mi (9,508.48 km) |
| Gretna to Ialysos | 6,351.51 mi (10,221.77 km) |
| Gretna to Ilion | 6,090.77 mi (9,802.15 km) |
| Gretna to Ilioupoli | 6,097.14 mi (9,812.40 km) |
| Gretna to Ioannina | 5,900.61 mi (9,496.11 km) |
| Gretna to Irakleio | 6,267.78 mi (10,087.02 km) |
| Gretna to Irakleio | 6,092.95 mi (9,805.66 km) |
| Gretna to Kaisariani | 6,096.03 mi (9,810.61 km) |
| Gretna to Kalamaria | 5,952.35 mi (9,579.38 km) |
| Gretna to Kalamata | 6,062.64 mi (9,756.88 km) |
| Gretna to Kallithea | 6,094.27 mi (9,807.79 km) |
| Gretna to Kalymnos | 6,276.58 mi (10,101.17 km) |
| Gretna to Kalyvia Thorikou | 6,108.56 mi (9,830.77 km) |
| Gretna to Kamatero | 6,090.18 mi (9,801.20 km) |
