| Ortona to Oberkirch | 525.24 mi (845.28 km) |
| Ortona to Obernburg am Main | 575.23 mi (925.75 km) |
| Ortona to Obernkirchen | 727.99 mi (1,171.58 km) |
| Ortona to Oberschleissheim | 430.20 mi (692.34 km) |
| Ortona to Oberstdorf | 403.49 mi (649.35 km) |
| Ortona to Obertraubling | 469.60 mi (755.75 km) |
| Ortona to Obertshausen | 595.51 mi (958.38 km) |
| Ortona to Oberursel | 609.27 mi (980.52 km) |
| Ortona to Ochsenfurt | 545.34 mi (877.65 km) |
| Ortona to Ochsenhausen | 450.67 mi (725.28 km) |
| Ortona to Ochtrup | 759.32 mi (1,222.00 km) |
| Ortona to Odenthal | 691.38 mi (1,112.67 km) |
| Ortona to Oelde | 717.52 mi (1,154.74 km) |
| Ortona to Oelsnitz | 567.36 mi (913.07 km) |
| Ortona to Oer-Erkenschwick | 724.24 mi (1,165.55 km) |
