| Radolfzell am Bodensee to Kastoria | 786.25 mi (1,265.35 km) |
| Radolfzell am Bodensee to Katerini | 845.65 mi (1,360.94 km) |
| Radolfzell am Bodensee to Keratsini | 999.95 mi (1,609.26 km) |
| Radolfzell am Bodensee to Kerkyra | 781.85 mi (1,258.27 km) |
| Radolfzell am Bodensee to Kiato | 965.97 mi (1,554.59 km) |
| Radolfzell am Bodensee to Kifisia | 1,001.53 mi (1,611.80 km) |
| Radolfzell am Bodensee to Kilkis | 828.12 mi (1,332.72 km) |
| Radolfzell am Bodensee to Komotini | 929.54 mi (1,495.94 km) |
| Radolfzell am Bodensee to Korinthos | 976.11 mi (1,570.89 km) |
| Radolfzell am Bodensee to Koropi | 1,012.85 mi (1,630.03 km) |
| Radolfzell am Bodensee to Korydallos | 1,000.34 mi (1,609.89 km) |
| Radolfzell am Bodensee to Kos | 1,193.56 mi (1,920.84 km) |
| Radolfzell am Bodensee to Kozani | 816.30 mi (1,313.70 km) |
| Radolfzell am Bodensee to Lagos | 914.23 mi (1,471.30 km) |
| Radolfzell am Bodensee to Lamia | 909.10 mi (1,463.05 km) |
