| Portalegre to Glyka Nera | 1,681.05 mi (2,705.38 km) |
| Portalegre to Grevena | 1,527.54 mi (2,458.33 km) |
| Portalegre to Ialysos | 1,937.79 mi (3,118.57 km) |
| Portalegre to Ilion | 1,672.54 mi (2,691.69 km) |
| Portalegre to Ilioupoli | 1,676.74 mi (2,698.45 km) |
| Portalegre to Ioannina | 1,501.26 mi (2,416.05 km) |
| Portalegre to Irakleio | 1,799.48 mi (2,895.99 km) |
| Portalegre to Irakleio | 1,675.82 mi (2,696.97 km) |
| Portalegre to Kaisariani | 1,676.63 mi (2,698.28 km) |
| Portalegre to Kalamaria | 1,602.85 mi (2,579.54 km) |
| Portalegre to Kalamata | 1,604.34 mi (2,581.94 km) |
| Portalegre to Kallithea | 1,673.82 mi (2,693.76 km) |
| Portalegre to Kalymnos | 1,864.76 mi (3,001.03 km) |
| Portalegre to Kalyvia Thorikou | 1,687.16 mi (2,715.23 km) |
| Portalegre to Kamatero | 1,672.77 mi (2,692.06 km) |
