| Oristano to Oberkirch | 596.63 mi (960.18 km) |
| Oristano to Obernburg am Main | 686.91 mi (1,105.47 km) |
| Oristano to Obernkirchen | 854.40 mi (1,375.03 km) |
| Oristano to Oberschleissheim | 595.01 mi (957.58 km) |
| Oristano to Oberstdorf | 525.25 mi (845.31 km) |
| Oristano to Obertraubling | 650.16 mi (1,046.34 km) |
| Oristano to Obertshausen | 702.15 mi (1,130.00 km) |
| Oristano to Oberursel | 711.49 mi (1,145.03 km) |
| Oristano to Ochsenfurt | 677.10 mi (1,089.68 km) |
| Oristano to Ochsenhausen | 568.23 mi (914.48 km) |
| Oristano to Ochtrup | 852.44 mi (1,371.87 km) |
| Oristano to Odenthal | 772.11 mi (1,242.59 km) |
| Oristano to Oelde | 824.38 mi (1,326.71 km) |
| Oristano to Oelsnitz | 746.59 mi (1,201.53 km) |
| Oristano to Oer-Erkenschwick | 813.44 mi (1,309.10 km) |
