| Letchworth to Glyka Nera | 1,510.19 mi (2,430.41 km) |
| Letchworth to Grevena | 1,315.84 mi (2,117.65 km) |
| Letchworth to Ialysos | 1,750.95 mi (2,817.88 km) |
| Letchworth to Ilion | 1,502.62 mi (2,418.23 km) |
| Letchworth to Ilioupoli | 1,509.56 mi (2,429.40 km) |
| Letchworth to Ioannina | 1,315.99 mi (2,117.89 km) |
| Letchworth to Irakleio | 1,695.30 mi (2,728.32 km) |
| Letchworth to Irakleio | 1,504.21 mi (2,420.80 km) |
| Letchworth to Kaisariani | 1,508.07 mi (2,427.01 km) |
| Letchworth to Kalamaria | 1,348.70 mi (2,170.52 km) |
| Letchworth to Kalamata | 1,497.66 mi (2,410.25 km) |
| Letchworth to Kallithea | 1,506.87 mi (2,425.08 km) |
| Letchworth to Kalymnos | 1,677.90 mi (2,700.31 km) |
| Letchworth to Kalyvia Thorikou | 1,520.79 mi (2,447.47 km) |
| Letchworth to Kamatero | 1,501.71 mi (2,416.77 km) |
