| Montalegre to Oberkirch | 898.93 mi (1,446.68 km) |
| Montalegre to Obernburg am Main | 982.01 mi (1,580.39 km) |
| Montalegre to Obernkirchen | 1,069.66 mi (1,721.45 km) |
| Montalegre to Oberschleissheim | 1,040.44 mi (1,674.43 km) |
| Montalegre to Oberstdorf | 966.03 mi (1,554.67 km) |
| Montalegre to Obertraubling | 1,082.36 mi (1,741.89 km) |
| Montalegre to Obertshausen | 977.47 mi (1,573.08 km) |
| Montalegre to Oberursel | 972.30 mi (1,564.76 km) |
| Montalegre to Ochsenfurt | 1,013.04 mi (1,630.33 km) |
| Montalegre to Ochsenhausen | 965.91 mi (1,554.48 km) |
| Montalegre to Ochtrup | 1,002.57 mi (1,613.47 km) |
| Montalegre to Odenthal | 950.19 mi (1,529.18 km) |
| Montalegre to Oelde | 1,018.80 mi (1,639.61 km) |
| Montalegre to Oelsnitz | 1,119.87 mi (1,802.26 km) |
| Montalegre to Oer-Erkenschwick | 980.17 mi (1,577.43 km) |
