| Montmelo to Oberkirch | 559.60 mi (900.59 km) |
| Montmelo to Obernburg am Main | 661.39 mi (1,064.41 km) |
| Montmelo to Obernkirchen | 807.10 mi (1,298.91 km) |
| Montmelo to Oberschleissheim | 648.63 mi (1,043.87 km) |
| Montmelo to Oberstdorf | 565.38 mi (909.90 km) |
| Montmelo to Obertraubling | 702.29 mi (1,130.22 km) |
| Montmelo to Obertshausen | 667.52 mi (1,074.27 km) |
| Montmelo to Oberursel | 670.01 mi (1,078.27 km) |
| Montmelo to Ochsenfurt | 674.19 mi (1,085.01 km) |
| Montmelo to Ochsenhausen | 586.89 mi (944.51 km) |
| Montmelo to Ochtrup | 771.54 mi (1,241.68 km) |
| Montmelo to Odenthal | 694.51 mi (1,117.70 km) |
| Montmelo to Oelde | 762.62 mi (1,227.31 km) |
| Montmelo to Oelsnitz | 774.19 mi (1,245.95 km) |
| Montmelo to Oer-Erkenschwick | 735.86 mi (1,184.25 km) |
