| Welwyn Garden City to Glyka Nera | 1,502.87 mi (2,418.64 km) |
| Welwyn Garden City to Grevena | 1,308.57 mi (2,105.94 km) |
| Welwyn Garden City to Ialysos | 1,744.24 mi (2,807.09 km) |
| Welwyn Garden City to Ilion | 1,495.28 mi (2,406.42 km) |
| Welwyn Garden City to Ilioupoli | 1,502.20 mi (2,417.56 km) |
| Welwyn Garden City to Ioannina | 1,308.41 mi (2,105.68 km) |
| Welwyn Garden City to Irakleio | 1,687.58 mi (2,715.90 km) |
| Welwyn Garden City to Irakleio | 1,496.90 mi (2,409.03 km) |
| Welwyn Garden City to Kaisariani | 1,500.73 mi (2,415.19 km) |
| Welwyn Garden City to Kalamaria | 1,342.02 mi (2,159.78 km) |
| Welwyn Garden City to Kalamata | 1,489.62 mi (2,397.32 km) |
| Welwyn Garden City to Kallithea | 1,499.51 mi (2,413.23 km) |
| Welwyn Garden City to Kalymnos | 1,671.07 mi (2,689.33 km) |
| Welwyn Garden City to Kalyvia Thorikou | 1,513.44 mi (2,435.65 km) |
| Welwyn Garden City to Kamatero | 1,494.38 mi (2,404.98 km) |
