| Niederkassel to Grevena | 1,014.61 mi (1,632.86 km) |
| Niederkassel to Ialysos | 1,441.42 mi (2,319.73 km) |
| Niederkassel to Ilion | 1,201.34 mi (1,933.37 km) |
| Niederkassel to Ilioupoli | 1,208.48 mi (1,944.87 km) |
| Niederkassel to Ioannina | 1,019.28 mi (1,640.37 km) |
| Niederkassel to Irakleio | 1,398.65 mi (2,250.91 km) |
| Niederkassel to Irakleio | 1,202.62 mi (1,935.44 km) |
| Niederkassel to Kaisariani | 1,206.83 mi (1,942.21 km) |
| Niederkassel to Kalamaria | 1,039.91 mi (1,673.57 km) |
| Niederkassel to Kalamata | 1,207.25 mi (1,942.88 km) |
| Niederkassel to Kallithea | 1,205.92 mi (1,940.74 km) |
| Niederkassel to Kalymnos | 1,369.76 mi (2,204.41 km) |
| Niederkassel to Kalyvia Thorikou | 1,219.49 mi (1,962.57 km) |
| Niederkassel to Kamatero | 1,200.28 mi (1,931.67 km) |
| Niederkassel to Karditsa | 1,069.75 mi (1,721.60 km) |
