| Castanet-Tolosan to Oestrich-Winkel | 543.09 mi (874.03 km) |
| Castanet-Tolosan to Offenburg | 460.60 mi (741.26 km) |
| Castanet-Tolosan to Oftersheim | 526.29 mi (846.99 km) |
| Castanet-Tolosan to Ohrdruf | 664.86 mi (1,070.00 km) |
| Castanet-Tolosan to Ohringen | 547.00 mi (880.32 km) |
| Castanet-Tolosan to Olbernhau | 742.76 mi (1,195.36 km) |
| Castanet-Tolosan to Olching | 571.99 mi (920.54 km) |
| Castanet-Tolosan to Oldenburg | 732.53 mi (1,178.89 km) |
| Castanet-Tolosan to Oldenburg in Holstein | 856.73 mi (1,378.77 km) |
| Castanet-Tolosan to Olfen | 628.96 mi (1,012.21 km) |
| Castanet-Tolosan to Olpe | 596.84 mi (960.53 km) |
| Castanet-Tolosan to Olsberg | 631.48 mi (1,016.27 km) |
| Castanet-Tolosan to Oranienburg | 834.80 mi (1,343.48 km) |
| Castanet-Tolosan to Ortenberg | 591.36 mi (951.71 km) |
| Castanet-Tolosan to Oschatz | 762.48 mi (1,227.09 km) |
