| Niederkassel to Kayapinar | 1,841.70 mi (2,963.93 km) |
| Niederkassel to Kayseri | 1,611.75 mi (2,593.87 km) |
| Niederkassel to Kemalpasa | 1,310.28 mi (2,108.69 km) |
| Niederkassel to Kemer | 1,519.40 mi (2,445.23 km) |
| Niederkassel to Keskin | 1,492.72 mi (2,402.30 km) |
| Niederkassel to Kilimli | 1,341.74 mi (2,159.32 km) |
| Niederkassel to Kilis | 1,770.45 mi (2,849.27 km) |
| Niederkassel to Kinik | 1,275.31 mi (2,052.42 km) |
| Niederkassel to Kirikkale | 1,481.20 mi (2,383.77 km) |
| Niederkassel to Kirkagac | 1,285.76 mi (2,069.23 km) |
| Niederkassel to Kirklareli | 1,144.66 mi (1,842.16 km) |
| Niederkassel to Kirsehir | 1,538.55 mi (2,476.06 km) |
| Niederkassel to Kizilpinar | 1,194.84 mi (1,922.91 km) |
| Niederkassel to Kiziltepe | 1,891.50 mi (3,044.08 km) |
| Niederkassel to Kocaali | 1,319.70 mi (2,123.85 km) |
