| Youngstown to Oberkirch | 4,128.87 mi (6,644.78 km) |
| Youngstown to Obernburg am Main | 4,126.42 mi (6,640.82 km) |
| Youngstown to Obernkirchen | 4,045.26 mi (6,510.22 km) |
| Youngstown to Oberschleissheim | 4,276.68 mi (6,882.64 km) |
| Youngstown to Oberstdorf | 4,255.70 mi (6,848.89 km) |
| Youngstown to Obertraubling | 4,274.32 mi (6,878.85 km) |
| Youngstown to Obertshausen | 4,106.83 mi (6,609.31 km) |
| Youngstown to Oberursel | 4,092.33 mi (6,585.97 km) |
| Youngstown to Ochsenfurt | 4,168.83 mi (6,709.08 km) |
| Youngstown to Ochsenhausen | 4,219.04 mi (6,789.89 km) |
| Youngstown to Ochtrup | 3,974.77 mi (6,396.77 km) |
| Youngstown to Odenthal | 4,008.87 mi (6,451.65 km) |
| Youngstown to Oelde | 4,022.82 mi (6,474.11 km) |
| Youngstown to Oelsnitz | 4,222.58 mi (6,795.58 km) |
| Youngstown to Oer-Erkenschwick | 3,994.73 mi (6,428.89 km) |
