| Flensburg to Grevena | 1,156.17 mi (1,860.68 km) |
| Flensburg to Ialysos | 1,547.81 mi (2,490.96 km) |
| Flensburg to Ilion | 1,336.19 mi (2,150.39 km) |
| Flensburg to Ilioupoli | 1,343.60 mi (2,162.32 km) |
| Flensburg to Ioannina | 1,170.48 mi (1,883.71 km) |
| Flensburg to Irakleio | 1,538.42 mi (2,475.85 km) |
| Flensburg to Irakleio | 1,336.71 mi (2,151.23 km) |
| Flensburg to Kaisariani | 1,341.61 mi (2,159.11 km) |
| Flensburg to Kalamaria | 1,160.67 mi (1,867.92 km) |
| Flensburg to Kalamata | 1,364.19 mi (2,195.46 km) |
| Flensburg to Kallithea | 1,341.39 mi (2,158.76 km) |
| Flensburg to Kalymnos | 1,482.06 mi (2,385.14 km) |
| Flensburg to Kalyvia Thorikou | 1,353.74 mi (2,178.64 km) |
| Flensburg to Kamatero | 1,334.82 mi (2,148.19 km) |
| Flensburg to Karditsa | 1,212.11 mi (1,950.71 km) |
