| Radolfzell am Bodensee to Navodari | 968.64 mi (1,558.87 km) |
| Radolfzell am Bodensee to Negresti-Oas | 670.06 mi (1,078.36 km) |
| Radolfzell am Bodensee to Nehoiu | 838.33 mi (1,349.17 km) |
| Radolfzell am Bodensee to Ocna Mures | 705.98 mi (1,136.17 km) |
| Radolfzell am Bodensee to Odobesti | 865.53 mi (1,392.94 km) |
| Radolfzell am Bodensee to Odorheiu Secuiesc | 774.14 mi (1,245.86 km) |
| Radolfzell am Bodensee to Oltenita | 883.80 mi (1,422.34 km) |
| Radolfzell am Bodensee to Onesti | 843.21 mi (1,357.01 km) |
| Radolfzell am Bodensee to Oradea | 606.82 mi (976.58 km) |
| Radolfzell am Bodensee to Orastie | 684.73 mi (1,101.96 km) |
| Radolfzell am Bodensee to Oravita | 633.22 mi (1,019.08 km) |
| Radolfzell am Bodensee to Orsova | 673.66 mi (1,084.15 km) |
| Radolfzell am Bodensee to Otelu Rosu | 652.44 mi (1,050.00 km) |
| Radolfzell am Bodensee to Otopeni | 845.85 mi (1,361.27 km) |
| Radolfzell am Bodensee to Ovidiu | 967.45 mi (1,556.96 km) |
