| Monroe to Oberkirch | 4,994.24 mi (8,037.45 km) |
| Monroe to Obernburg am Main | 4,991.28 mi (8,032.69 km) |
| Monroe to Obernkirchen | 4,908.19 mi (7,898.96 km) |
| Monroe to Oberschleissheim | 5,141.81 mi (8,274.94 km) |
| Monroe to Oberstdorf | 5,121.08 mi (8,241.59 km) |
| Monroe to Obertraubling | 5,139.03 mi (8,270.47 km) |
| Monroe to Obertshausen | 4,971.64 mi (8,001.07 km) |
| Monroe to Oberursel | 4,957.11 mi (7,977.70 km) |
| Monroe to Ochsenfurt | 5,033.61 mi (8,100.82 km) |
| Monroe to Ochsenhausen | 5,084.38 mi (8,182.51 km) |
| Monroe to Ochtrup | 4,838.40 mi (7,786.65 km) |
| Monroe to Odenthal | 4,873.45 mi (7,843.06 km) |
| Monroe to Oelde | 4,886.51 mi (7,864.08 km) |
| Monroe to Oelsnitz | 5,086.25 mi (8,185.54 km) |
| Monroe to Oer-Erkenschwick | 4,858.84 mi (7,819.54 km) |
