| Klagenfurt to Oignies | 580.84 mi (934.76 km) |
| Klagenfurt to Oissel | 638.30 mi (1,027.24 km) |
| Klagenfurt to Olivet | 587.34 mi (945.23 km) |
| Klagenfurt to Ollioules | 478.17 mi (769.54 km) |
| Klagenfurt to Olonne-sur-Mer | 762.05 mi (1,226.41 km) |
| Klagenfurt to Oloron-Sainte-Marie | 765.47 mi (1,231.90 km) |
| Klagenfurt to Onet Village | 587.32 mi (945.21 km) |
| Klagenfurt to Onnaing | 554.18 mi (891.87 km) |
| Klagenfurt to Orange | 491.01 mi (790.21 km) |
| Klagenfurt to Orchies | 570.86 mi (918.71 km) |
| Klagenfurt to Orleans | 587.13 mi (944.90 km) |
| Klagenfurt to Orly | 572.40 mi (921.19 km) |
| Klagenfurt to Ormesson-sur-Marne | 566.42 mi (911.57 km) |
| Klagenfurt to Orsay | 581.06 mi (935.12 km) |
| Klagenfurt to Orthez | 765.36 mi (1,231.73 km) |
