| Knokke-Heist to Obernburg am Main | 276.87 mi (445.57 km) |
| Knokke-Heist to Obernkirchen | 257.11 mi (413.78 km) |
| Knokke-Heist to Oberschleissheim | 426.24 mi (685.97 km) |
| Knokke-Heist to Oberstdorf | 415.30 mi (668.36 km) |
| Knokke-Heist to Obertraubling | 425.66 mi (685.03 km) |
| Knokke-Heist to Obertshausen | 258.11 mi (415.39 km) |
| Knokke-Heist to Oberursel | 244.09 mi (392.82 km) |
| Knokke-Heist to Ochsenfurt | 319.94 mi (514.89 km) |
| Knokke-Heist to Ochsenhausen | 373.40 mi (600.93 km) |
| Knokke-Heist to Ochtrup | 177.22 mi (285.20 km) |
| Knokke-Heist to Odenthal | 167.19 mi (269.07 km) |
| Knokke-Heist to Oelde | 211.48 mi (340.34 km) |
| Knokke-Heist to Oelsnitz | 392.10 mi (631.02 km) |
| Knokke-Heist to Oer-Erkenschwick | 171.76 mi (276.43 km) |
| Knokke-Heist to Oerlinghausen | 234.57 mi (377.50 km) |
