| Porto Recanati to Oberkirch | 442.49 mi (712.12 km) |
| Porto Recanati to Obernburg am Main | 491.78 mi (791.44 km) |
| Porto Recanati to Obernkirchen | 645.44 mi (1,038.74 km) |
| Porto Recanati to Oberschleissheim | 347.82 mi (559.76 km) |
| Porto Recanati to Oberstdorf | 320.05 mi (515.07 km) |
| Porto Recanati to Obertraubling | 388.96 mi (625.98 km) |
| Porto Recanati to Obertshausen | 512.03 mi (824.03 km) |
| Porto Recanati to Oberursel | 525.76 mi (846.13 km) |
| Porto Recanati to Ochsenfurt | 462.25 mi (743.92 km) |
| Porto Recanati to Ochsenhausen | 367.16 mi (590.89 km) |
| Porto Recanati to Ochtrup | 675.88 mi (1,087.72 km) |
| Porto Recanati to Odenthal | 607.88 mi (978.28 km) |
| Porto Recanati to Oelde | 634.26 mi (1,020.75 km) |
| Porto Recanati to Oelsnitz | 487.70 mi (784.88 km) |
| Porto Recanati to Oer-Erkenschwick | 640.73 mi (1,031.16 km) |
