| Radolfzell am Bodensee to Opwijk | 310.14 mi (499.12 km) |
| Radolfzell am Bodensee to Ostend | 363.00 mi (584.19 km) |
| Radolfzell am Bodensee to Oud-Heverlee | 288.76 mi (464.71 km) |
| Radolfzell am Bodensee to Oud-Turnhout | 305.22 mi (491.20 km) |
| Radolfzell am Bodensee to Oudenaarde | 323.67 mi (520.90 km) |
| Radolfzell am Bodensee to Oudenburg | 358.44 mi (576.86 km) |
| Radolfzell am Bodensee to Oupeye | 254.40 mi (409.42 km) |
| Radolfzell am Bodensee to Overijse | 290.37 mi (467.31 km) |
| Radolfzell am Bodensee to Overpelt | 288.59 mi (464.44 km) |
| Radolfzell am Bodensee to Paal | 285.03 mi (458.72 km) |
| Radolfzell am Bodensee to Peer | 282.93 mi (455.33 km) |
| Radolfzell am Bodensee to Pepinster | 242.01 mi (389.47 km) |
| Radolfzell am Bodensee to Peruwelz | 310.08 mi (499.03 km) |
| Radolfzell am Bodensee to Perwez | 273.88 mi (440.77 km) |
| Radolfzell am Bodensee to Philippeville | 262.95 mi (423.17 km) |
