| Radolfzell am Bodensee to Oerlinghausen | 292.80 mi (471.22 km) |
| Radolfzell am Bodensee to Oestrich-Winkel | 162.66 mi (261.77 km) |
| Radolfzell am Bodensee to Offenburg | 69.58 mi (111.98 km) |
| Radolfzell am Bodensee to Oftersheim | 114.47 mi (184.22 km) |
| Radolfzell am Bodensee to Ohrdruf | 228.15 mi (367.17 km) |
| Radolfzell am Bodensee to Ohringen | 104.24 mi (167.76 km) |
| Radolfzell am Bodensee to Olbernhau | 282.65 mi (454.87 km) |
| Radolfzell am Bodensee to Olching | 113.39 mi (182.49 km) |
| Radolfzell am Bodensee to Oldenburg | 375.30 mi (603.98 km) |
| Radolfzell am Bodensee to Oldenburg in Holstein | 461.25 mi (742.32 km) |
| Radolfzell am Bodensee to Olfen | 284.15 mi (457.29 km) |
| Radolfzell am Bodensee to Olpe | 232.51 mi (374.19 km) |
| Radolfzell am Bodensee to Olsberg | 250.83 mi (403.67 km) |
| Radolfzell am Bodensee to Oranienburg | 394.75 mi (635.29 km) |
| Radolfzell am Bodensee to Ortenberg | 181.24 mi (291.68 km) |
