| Klagenfurt to Obernburg am Main | 325.40 mi (523.68 km) |
| Klagenfurt to Obernkirchen | 454.24 mi (731.03 km) |
| Klagenfurt to Oberschleissheim | 170.44 mi (274.29 km) |
| Klagenfurt to Oberstdorf | 197.16 mi (317.30 km) |
| Klagenfurt to Obertraubling | 190.11 mi (305.95 km) |
| Klagenfurt to Obertshausen | 346.03 mi (556.88 km) |
| Klagenfurt to Oberursel | 360.79 mi (580.63 km) |
| Klagenfurt to Ochsenfurt | 286.32 mi (460.79 km) |
| Klagenfurt to Ochsenhausen | 227.16 mi (365.58 km) |
| Klagenfurt to Ochtrup | 500.78 mi (805.92 km) |
| Klagenfurt to Odenthal | 446.71 mi (718.91 km) |
| Klagenfurt to Oelde | 454.55 mi (731.53 km) |
| Klagenfurt to Oelsnitz | 280.09 mi (450.76 km) |
| Klagenfurt to Oer-Erkenschwick | 470.89 mi (757.83 km) |
| Klagenfurt to Oerlinghausen | 448.13 mi (721.19 km) |
