| Montesilvano to Oberkirch | 508.74 mi (818.74 km) |
| Montesilvano to Obernburg am Main | 559.69 mi (900.74 km) |
| Montesilvano to Obernkirchen | 713.29 mi (1,147.94 km) |
| Montesilvano to Oberschleissheim | 415.59 mi (668.82 km) |
| Montesilvano to Oberstdorf | 387.45 mi (623.54 km) |
| Montesilvano to Obertraubling | 455.85 mi (733.63 km) |
| Montesilvano to Obertshausen | 579.91 mi (933.28 km) |
| Montesilvano to Oberursel | 593.60 mi (955.31 km) |
| Montesilvano to Ochsenfurt | 530.24 mi (853.33 km) |
| Montesilvano to Ochsenhausen | 434.78 mi (699.70 km) |
| Montesilvano to Ochtrup | 743.80 mi (1,197.04 km) |
| Montesilvano to Odenthal | 675.46 mi (1,087.04 km) |
| Montesilvano to Oelde | 702.26 mi (1,130.17 km) |
| Montesilvano to Oelsnitz | 554.05 mi (891.65 km) |
| Montesilvano to Oer-Erkenschwick | 708.56 mi (1,140.32 km) |
