| Castelnaudary to Oestrich-Winkel | 543.05 mi (873.95 km) |
| Castelnaudary to Offenburg | 457.12 mi (735.66 km) |
| Castelnaudary to Oftersheim | 523.88 mi (843.10 km) |
| Castelnaudary to Ohrdruf | 662.30 mi (1,065.86 km) |
| Castelnaudary to Ohringen | 542.70 mi (873.39 km) |
| Castelnaudary to Olbernhau | 736.98 mi (1,186.06 km) |
| Castelnaudary to Olching | 562.79 mi (905.72 km) |
| Castelnaudary to Oldenburg | 736.81 mi (1,185.79 km) |
| Castelnaudary to Oldenburg in Holstein | 859.16 mi (1,382.68 km) |
| Castelnaudary to Olfen | 632.75 mi (1,018.31 km) |
| Castelnaudary to Olpe | 598.88 mi (963.81 km) |
| Castelnaudary to Olsberg | 633.01 mi (1,018.73 km) |
| Castelnaudary to Oranienburg | 832.72 mi (1,340.14 km) |
| Castelnaudary to Ortenberg | 590.26 mi (949.93 km) |
| Castelnaudary to Oschatz | 758.10 mi (1,220.05 km) |
