| Klagenfurt to Oestrich-Winkel | 371.89 mi (598.50 km) |
| Klagenfurt to Offenburg | 323.16 mi (520.08 km) |
| Klagenfurt to Oftersheim | 325.49 mi (523.83 km) |
| Klagenfurt to Ohrdruf | 333.23 mi (536.29 km) |
| Klagenfurt to Ohringen | 285.00 mi (458.66 km) |
| Klagenfurt to Olbernhau | 283.28 mi (455.89 km) |
| Klagenfurt to Olching | 177.26 mi (285.27 km) |
| Klagenfurt to Oldenburg | 525.70 mi (846.03 km) |
| Klagenfurt to Oldenburg in Holstein | 551.56 mi (887.65 km) |
| Klagenfurt to Olfen | 470.55 mi (757.28 km) |
| Klagenfurt to Olpe | 422.75 mi (680.35 km) |
| Klagenfurt to Olsberg | 419.87 mi (675.72 km) |
| Klagenfurt to Oranienburg | 426.72 mi (686.73 km) |
| Klagenfurt to Ortenberg | 352.57 mi (567.41 km) |
| Klagenfurt to Oschatz | 328.09 mi (528.00 km) |
