| Carbonia to Oberkirch | 647.50 mi (1,042.05 km) |
| Carbonia to Obernburg am Main | 738.04 mi (1,187.77 km) |
| Carbonia to Obernkirchen | 905.51 mi (1,457.29 km) |
| Carbonia to Oberschleissheim | 645.58 mi (1,038.96 km) |
| Carbonia to Oberstdorf | 576.27 mi (927.42 km) |
| Carbonia to Obertraubling | 700.56 mi (1,127.44 km) |
| Carbonia to Obertshausen | 753.24 mi (1,212.22 km) |
| Carbonia to Oberursel | 762.53 mi (1,227.17 km) |
| Carbonia to Ochsenfurt | 728.25 mi (1,172.00 km) |
| Carbonia to Ochsenhausen | 619.36 mi (996.77 km) |
| Carbonia to Ochtrup | 903.12 mi (1,453.42 km) |
| Carbonia to Odenthal | 822.69 mi (1,323.99 km) |
| Carbonia to Oelde | 875.33 mi (1,408.70 km) |
| Carbonia to Oelsnitz | 797.28 mi (1,283.11 km) |
| Carbonia to Oer-Erkenschwick | 864.11 mi (1,390.65 km) |
